Topic leaderboard
Production of cellulose & pulping liquors
Ranked by the PatentIndex Score — a 1–99 percentile within D21C · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest D21C patents became public in the last 2 years — the current frontier
- 199Markus Weissenberger23 patents · 73 citations
- 296Markus Pagels19 patents · 69 citations
- 392Clay Purdy22 patents · 62 citations
- 488Kyle G. Wynnyk22 patents · 62 citations
- 583Toshio Hiraoka18 patents · 21 citations
- 679David John Paulson3 patents · 807 citations
- 775Mainak Chowdhury4 patents · 20 citations
- 871Philip A. Kratz4 patents · 20 citations
- 967Khosrow Parviz Mohammadi5 patents · 13 citations
- 1063Richard Louis Underhill2 patents · 807 citations
- 1158Michelle Maranta6 patents · 10 citations
- 1254Patrik Pettersson10 patents · 10 citations
- 1350Kit Kellebjerg Mogensen5 patents · 8 citations
- 1446Zhiying Yu4 patents · 9 citations
- 1542Matt Sweeney6 patents · 4 citations
- 1638Mark Wogulis6 patents · 4 citations
- 1733Doreen Bohan5 patents · 3 citations
- 1829Janine Lin5 patents · 3 citations
- 1925Leslie Beresford5 patents · 3 citations
- 2021Nicholas William Geary4 patents · 5 citations
- 2117Elizabeth Znameroski4 patents · 3 citations
- 2213Charles C. Gallop3 patents · 4 citations
- 238Martin Dan Jeppesen4 patents · 4 citations
- 244Noritomo Kurita6 patents · 3 citations
- 251Stefan Truniger4 patents · 3 citations
Active· last 5 yrs
Sustained D21C output across the last 5 years
- 199Mengkui Luo39 patents · 2,383 citations
- 296Terrence J. Collins7 patents · 370 citations
- 392Hugh West7 patents · 361 citations
- 488Daniel W. Sumnicht7 patents · 229 citations
- 583Theodora Retsina36 patents · 221 citations
- 679Vesa Pylkkanen27 patents · 200 citations
- 775Arthur J. Nonni34 patents · 182 citations
- 871Peter R. Abitz16 patents · 132 citations
- 967Brian Foody12 patents · 180 citations
- 1063Auvo Kettunen12 patents · 138 citations
- 1158Harri Qvintus9 patents · 132 citations
- 1254Bertus Noordam8 patents · 64 citations
- 1350Michael Petrus Jozef Berkhout8 patents · 64 citations
- 1446Charles E. Courchene33 patents · 88 citations
- 1542Christopher Michael Slone20 patents · 70 citations
- 1638Mikael Lindstrom20 patents · 139 citations
- 1733Kari Peltonen10 patents · 117 citations
- 1829John Claude Husband7 patents · 82 citations
- 1925Per Svending7 patents · 82 citations
- 2021Tafadzwa Motsi9 patents · 82 citations
- 2117Isto Heiskanen21 patents · 119 citations
- 2213Kaj Backfolk19 patents · 114 citations
- 238Christofer Lindgren8 patents · 91 citations
- 244Mikko Likitalo6 patents · 82 citations
- 251Alan Coles5 patents · 81 citations
All-time canon
Career PatentIndex Score in D21C
- 199Richard A. Jewell31 patents · 2,562 citations
- 296Robert W. Torget5 patents · 982 citations
- 392Mengkui Luo39 patents · 2,383 citations
- 488Vincent A. Roscelli18 patents · 1,710 citations
- 583Marshall Medoff79 patents · 1,151 citations
- 679Peter A. Graef6 patents · 666 citations
- 775Clifford R. Bolstad5 patents · 558 citations
- 871W. Harvey Persinger, Jr.12 patents · 670 citations
- 967James Richard Spears10 patents · 822 citations
- 1063Markus Sakari Kauppinen19 patents · 543 citations
- 1158Albin F. Turbak7 patents · 640 citations
- 1254Fred W. Snyder7 patents · 640 citations
- 1350Karen R. Sandberg7 patents · 640 citations
- 1446George P. Philippidis5 patents · 707 citations
- 1542Lene Nonboe Andersen18 patents · 502 citations
- 1638Carlisle M. Herron4 patents · 1,988 citations
- 1733Terrence J. Collins7 patents · 370 citations
- 1829Colin P. Horwitz5 patents · 367 citations
- 1925Robert J. Makolin5 patents · 574 citations
- 2021Martin Schulein26 patents · 507 citations
- 2117Kiran Kadam9 patents · 705 citations
- 2213Sheng-Hsin Hu9 patents · 467 citations
- 238John A. Westland7 patents · 459 citations
- 244Brian Wester16 patents · 444 citations
- 251J. Robert Prough45 patents · 1,019 citations
Rising· last 2 yrs
The top-scoring D21C patents made public in the last 2 years
- 199US12146262B2✦ AINon-wood pulp having high brightness and low debris5 cites · 202469% earned
- 296US12098507B2✦ AIHigh porosity non-wood pulp4 cites · 202475% earned
- 392US12102947B1✦ AIBiodegradable air filter from date palm and method of fabrication thereof1 cites · 202450% earned
- 488US11920305B1Preparation method and application of multifunctional intelligent cellulose-based visual l1 cites · 202467% earned
- 583US12428785B2Efficient methods and compositions for recovery of products from organic acid pretreatment0 cites · 20250% earned
- 679US12583756B2Recovering a caustic solution via calcium carbonate crystal aggregates0 cites · 20250% earned
- 775US12331332B2GH61 variants and polynucleotides encoding same0 cites · 20240% earned
- 871US12364275B2Methods to produce high protein animal feed from a grain processing plant that produces al0 cites · 20240% earned
- 967US12215461B2Bleaching trichomes to remove proteins0 cites · 20240% earned
- 1063US12126389B2System for generating accurate reference signals for time-of-arrival based time synchroniz0 cites · 20240% earned
- 1158US12421536B2Methods of processing lignocellulosic biomass using single-stage autohydrolysis and enzyma0 cites · 20240% earned
- 1254US12258708B2Papermaking additive compositions and methods and uses thereof0 cites · 20240% earned
- 1350US12241202B2Process of transforming waste material into useful material0 cites · 20240% earned
- 1446US12409109B2Dry mixture and personal care composition as well as methods for their production0 cites · 20240% earned
- 1542US12492511B2Method for manufacturing onion pulp for paper and capsule0 cites · 20250% earned
- 1638US11851816B2Supported toothed plates in a disperser including bridge between teeth with cross-sectiona0 cites · 20240% earned
- 1733US12371853B2Modified sulfuric acid and uses thereof0 cites · 20240% earned
- 1829US12398037B2Modified sulfuric acid and uses thereof0 cites · 20240% earned
- 1925US12270151B2Modified sulfuric acid and uses thereof0 cites · 20240% earned
- 2021US12378727B2Modified sulfuric acid and uses thereof0 cites · 20240% earned
- 2117US12371854B2Modified sulfuric acid and uses thereof0 cites · 20240% earned
- 2213US12234604B2Modified sulfuric acid and uses thereof0 cites · 20240% earned
- 238US12364629B2Method for producing recycled pulp fibers, and recycled pulp fibers0 cites · 20240% earned
- 244US12215464B2Dispersible non-wood pulp0 cites · 20240% earned
- 251US12331461B2Black liquor viscosity reducing and anti-scale agent0 cites · 20240% earned
Active· last 5 yrs
The top-scoring D21C patents of the last 5 years
- 199US11982051B2✦ AITemperature-controlled delignification of biomass11 cites · 202288% earned
- 296US11982052B2✦ AICombination approach to delignification of biomass under ambient conditions12 cites · 202288% earned
- 392US12071724B2✦ AIApproach to biomass delignification10 cites · 202281% earned
- 488US11905656B2Approach to biomass delignification10 cites · 202281% earned
- 583US11668047B2Use of a 2 liquid phase system in biomass delignification10 cites · 202287% earned
- 679US11821139B2Approach to biomass delignification10 cites · 202287% earned
- 775US10903866B1System for generating accurate reference signals for time-of-arrival based time synchroniz10 cites · 202175% earned
- 871US12123138B2Arylsulfonic acid—modified sulfuric acid and uses thereof6 cites · 202285% earned
- 967US11834784B2Method for preparing unbleached biomechanical pulp and fully utilizing by-products by trea6 cites · 202285% earned
- 1063US12146262B2Non-wood pulp having high brightness and low debris5 cites · 202469% earned
- 1158US11932988B2Foam-based manufacturing system and process6 cites · 202385% earned
- 1254US11248343B2Oxygen barrier film8 cites · 202186% earned
- 1350US11624154B2Method for preparing unbleached biomechanical pulp from straw6 cites · 202185% earned
- 1446US11667538B2Recovering a caustic solution via calcium carbonate crystal aggregates4 cites · 202162% earned
- 1542US12098507B2High porosity non-wood pulp4 cites · 202475% earned
- 1638US12168727B2Transparent wood composite, systems and method of fabrication3 cites · 202267% earned
- 1733US12195919B2Multi-step low temperature and low pressure process for agricultural feedstock stock prepa3 cites · 202372% earned
- 1829US11910811B2Advanced processing methods to produce high protein feeds from dry grind cereal grains2 cites · 202358% earned
- 1925US11554514B2Strong and tough structural wood materials, and methods for fabricating and use thereof3 cites · 202263% earned
- 2021US11760720B2Modified sulfuric acid and uses thereof3 cites · 202172% earned
- 2117US11162218B1Biomass pulp digester3 cites · 202180% earned
- 2213US11846068B2Bleaching trichomes to remove proteins2 cites · 202258% earned
- 238US12077915B2Nanocellulose-reinforced corrugated medium2 cites · 202358% earned
- 244US12102947B1Biodegradable air filter from date palm and method of fabrication thereof1 cites · 202450% earned
- 251US11885069B2Processes, methods, and systems for chemo-mechanical cellular explosion and solid and liqu2 cites · 202361% earned
All-time canon
The defining D21C patents of the whole record
- 199US5137537A✦ AIAbsorbent structure containing individualized, polycarboxylic acid crosslinked wood pulp c1,277 cites · 199295% earned
- 296US10337148B2✦ AIHesperaloe tissue having improved cross-machine direction properties807 cites · 201895% earned
- 392US5429686A✦ AIApparatus for making soft tissue products538 cites · 199595% earned
- 488US5856164AAlkaline bacillus amylase496 cites · 199992% earned
- 583US5964983AMicrofibrillated cellulose and method for preparing a microfibrillated cellulose335 cites · 199994% earned
- 679US5549791AIndividualized cellulosic fibers crosslinked with polyacrylic acid polymers328 cites · 199694% earned
- 775US4461648AMethod for increasing the accessibility of cellulose in lignocellulosic materials, particu315 cites · 198494% earned
- 871US5705369APrehydrolysis of lignocellulose311 cites · 199894% earned
- 967US6183596B1Super microfibrillated cellulose, process for producing the same, and coated paper and tin290 cites · 200191% earned
- 1063US5190563AProcess for preparing individualized, polycarboxylic acid crosslinked fibers260 cites · 199394% earned
- 1158US5223090AMethod for fiber loading a chemical compound244 cites · 199391% earned
- 1254US4481077AProcess for preparing microfibrillated cellulose219 cites · 198494% earned
- 1350US4720383ASoftening and conditioning fibers with imidazolinium compounds217 cites · 198894% earned
- 1446US5424417APrehydrolysis of lignocellulose214 cites · 199591% earned
- 1542US4481076ARedispersible microfibrillated cellulose213 cites · 198494% earned
- 1638US4822453AAbsorbent structure containing individualized, crosslinked fibers207 cites · 198994% earned
- 1733US6146494AModified cellulosic fibers and fibrous webs containing these fibers203 cites · 200094% earned
- 1829US6022419AHydrolysis and fractionation of lignocellulosic biomass202 cites · 200094% earned
- 1925US7932065B2Processing biomass197 cites · 201080% earned
- 2021US4764596ARecovery of lignin196 cites · 198894% earned
- 2117US5059404AIndirectly heated thermochemical reactor apparatus and processes194 cites · 199187% earned
- 2213US7622693B2Plasma whirl reactor apparatus and methods of use193 cites · 200384% earned
- 238US6667424B1Absorbent articles with nits and free-flowing particles190 cites · 200391% earned
- 244US4594130APulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst186 cites · 198694% earned
- 251US6235392B1Lyocell fibers and process for their preparation185 cites · 200187% earned
Rising· last 2 yrs
Assignees whose newest D21C patents became public in the last 2 years — the current frontier
- 199KIMBERLY CLARK CO65 patents · 3,525 citations
- 296PROCTER & GAMBLE21 patents · 1,537 citations
- 392NOVOZYMES AS21 patents · 230 citations
- 488ANDRITZ INC80 patents · 372 citations
- 583SEIKO EPSON CORP34 patents · 84 citations
- 679SIXRING INC24 patents · 73 citations
- 775VALMET OY57 patents · 99 citations
- 871UNICHARM CORP24 patents · 25 citations
- 967ECOLAB USA INC14 patents · 20 citations
- 1063ZAINAR INC4 patents · 20 citations
- 1158BUCKMAN LABORATORIES INT INC6 patents · 7 citations
- 1254PIERSON CAPITAL ENVIRONMENTAL BEIJING LTD5 patents · 0 citations
- 1350ICM INC3 patents · 4 citations
- 1446CARBON ENG ULC3 patents · 2 citations
- 1542WEIDMANN HOLDING AG4 patents · 3 citations
- 1638SOEDRA SKOGSAEGARNA EKONOMISK FOERENING5 patents · 2 citations
- 1733IMAM MOHAMMAD IBN SAUD ISLAMIC UNIV3 patents · 1 citations
- 1829PAQUE JULIEN2 patents · 2 citations
- 1925NEOZYME INT INC3 patents · 0 citations
- 2021MONDI AG3 patents · 1 citations
- 2117UNIV UNITED ARAB EMIRATES3 patents · 0 citations
- 2213UNIV NORTHEAST FORESTRY2 patents · 1 citations
- 238BOULDIN CORP2 patents · 0 citations
- 244NEW ENERGY BLUE LLC1 patents · 0 citations
- 251KEMIN IND INC2 patents · 0 citations
Active· last 5 yrs
Sustained D21C output across the last 5 years
- 199KIMBERLY CLARK CO65 patents · 3,525 citations
- 296PROCTER & GAMBLE21 patents · 1,537 citations
- 392INT PAPER CO121 patents · 2,220 citations
- 488UNIV CARNEGIE MELLON7 patents · 370 citations
- 583EASTMAN CHEM CO15 patents · 411 citations
- 679NOVOZYMES AS21 patents · 230 citations
- 775BABCOCK & WILCOX CO12 patents · 247 citations
- 871KAO CORP21 patents · 354 citations
- 967UNIV NORTH CAROLINA STATE9 patents · 238 citations
- 1063ANDRITZ OY52 patents · 232 citations
- 1158ANDRITZ INC80 patents · 372 citations
- 1254DSM IP ASSETS BV7 patents · 64 citations
- 1350JUJO PAPER CO LTD25 patents · 151 citations
- 1446FIBERLEAN TECH LTD17 patents · 76 citations
- 1542DOMTAR PAPER CO LLC6 patents · 63 citations
- 1638SEIKO EPSON CORP34 patents · 84 citations
- 1733GP CELLULOSE GMBH31 patents · 59 citations
- 1829SIXRING INC24 patents · 73 citations
- 1925IOGEN CORP10 patents · 68 citations
- 2021CHEMIEFASER LENZING AG14 patents · 106 citations
- 2117VALMET OY57 patents · 99 citations
- 2213CARBON ENG LTD5 patents · 23 citations
- 238STORA ENSO OYJ29 patents · 52 citations
- 244FPINNOVATIONS15 patents · 39 citations
- 251UPM KYMMENE CORP29 patents · 39 citations
All-time canon
All-time PatentIndex Score in D21C
- 199KIMBERLY CLARK CO65 patents · 3,525 citations
- 296WEYERHAEUSER CO97 patents · 5,318 citations
- 392PROCTER & GAMBLE21 patents · 1,537 citations
- 488MIDWEST RESEARCH INST7 patents · 1,197 citations
- 583XYLECO INC57 patents · 803 citations
- 679ITT14 patents · 1,157 citations
- 775NOVO NORDISK AS43 patents · 1,520 citations
- 871US AGRICULTURE24 patents · 1,084 citations
- 967UNIV WAYNE STATE13 patents · 1,078 citations
- 1063INT PAPER CO121 patents · 2,220 citations
- 1158NALCO CHEMICAL CO46 patents · 1,312 citations
- 1254BKI HOLDING CORP6 patents · 421 citations
- 1350UNIV CARNEGIE MELLON7 patents · 370 citations
- 1446KAMYR INC84 patents · 1,757 citations
- 1542MEDOFF MARSHALL22 patents · 348 citations
- 1638EASTMAN CHEM CO15 patents · 411 citations
- 1733NAT STARCH CHEM INVEST6 patents · 372 citations
- 1829MO OCH DOMSJOE AB48 patents · 1,119 citations
- 1925PULP PAPER RES INST32 patents · 884 citations
- 2021CIBA SC HOLDING AG8 patents · 310 citations
- 2117GENENCOR INT19 patents · 398 citations
- 2213SCOTT PAPER CO7 patents · 411 citations
- 238WESTVACO CORP48 patents · 783 citations
- 244DOW CHEMICAL CO14 patents · 434 citations
- 251SCA HYGIENE PROD GMBH5 patents · 299 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth