Inventor · disambiguated record
Doetze Jakob Sikkema
Also filed as: SIKKEMA DOETZE J · SIKKEMA DOETZE JAKOB
24 granted patents·1 pending application·737 citations·filing 1975–2018
95Inventor score
Top patents by PatentIndex Score
25 records- 0197US4493870AFlexible layered productAKZO NV·Filed 1983·Granted Jan 15, 1985·241 cites·9 claims
- 0294US5674969ARigid rod polymer based on pyridobisimidazoleAKZO NOBEL NV·Filed 1994·Granted Oct 7, 1997·262 cites·19 claims
- 0393US7683157B2Process for the production of polyarenazole polymerDU PONT·Filed 2006·Granted Mar 23, 2010·20 cites·19 claims
- 0492US5939553AProcess for preparing pyridine-2,6-diaminesAKZO NOBEL NV·Filed 1996·Granted Aug 17, 1999·76 cites·10 claims
- 0591US6040478AProcess for dicarboxylating dihydric phenolsAKZO NOBEL NV·Filed 1998·Granted Mar 21, 2000·52 cites·13 claims
- 0688US5945537ANitration of pyridine-2, 6-diaminesAKZO NOBEL NV·Filed 1998·Granted Aug 31, 1999·42 cites·4 claims
- 0781US7776246B2Process for the production of polyarenazole yarnDU PONT·Filed 2006·Granted Aug 17, 2010·4 cites·18 claims
- 0877US7851584B2Process for preparing monomer complexesDU PONT·Filed 2006·Granted Dec 14, 2010·3 cites·13 claims
- 0975US7906615B2Process for hydrolyzing polyphosphoric acid in a spun yarnMAGELLAN SYSTEMS INT LLC·Filed 2006·Granted Mar 15, 2011·2 cites·18 claims
- 1074US7906613B2Process for removing cations from polyareneazole fiberMAGELLAN SYSTEMS INT LLC·Filed 2006·Granted Mar 15, 2011·2 cites·16 claims
- 1165US5001209ANon-linear optical active diols and polyurethanes prepared therefromAKZO NV·Filed 1989·Granted Mar 19, 1991·21 cites·5 claims
- 1261US7888457B2Process for removing phosphorous from a fiber or yarnDU PONT·Filed 2006·Granted Feb 15, 2011·2 cites·19 claims
- 1354US7671171B2Processes for preparing high inherent viscosity polyareneazoles using metal powdersDU PONT·Filed 2006·Granted Mar 2, 2010·0 cites·19 claims
- 1452US9187599B2Process for crosslinking a polymer comprising pyridyl groupsMXPOLYMERS B V·Filed 2012·Granted Nov 17, 2015·0 cites·18 claims
- 1551US11434329B2Polymers comprising sulfonated 2,6-diphenyl-1,4-phenylene oxide repeating unitsMXPOLYMERS B V·Filed 2018·Granted Sep 6, 2022·0 cites·15 claims
- 1651US8263221B2High inherent viscosity polymers and fibers therefromSIKKEMA DOETZE JAKOB·Filed 2006·Granted Sep 11, 2012·0 cites·16 claims
- 1750US2008287647A1Polyareneazole Polymer Fibers Having Pendant Hydroxyl Groups and CationsMAGELLAN SYSTEMS INT LLC·Filed 2006·Application pending·0 cites
- 1849US7683122B2Processes for increasing polymer inherent viscosityDU PONT·Filed 2006·Granted Mar 23, 2010·0 cites·20 claims
- 1948US7754846B2Thermal processes for increasing polyareneazole inherent viscositiesDU PONT·Filed 2006·Granted Jul 13, 2010·0 cites·20 claims
- 2045US8299202B2Phenol compounds and (co)polymers thereofSIKKEMA DOETZE JAKOB·Filed 2009·Granted Oct 30, 2012·0 cites·20 claims
- 2145US8197589B2Use of a (1>3)-β-D-glucan as an emulsion stabiliserLOMMERTS BERT JAN·Filed 2009·Granted Jun 12, 2012·0 cites·20 claims
- 2243US4758651AAmorphous aromatic copolyamide, a process for the preparation thereof, and shaped objectAKZO NV·Filed 1987·Granted Jul 19, 1988·5 cites·16 claims
- 2336US5010168AAramid polymer from aromatic dicarboxylic acid mixture and aromatic diamine mixtureAKZO NV·Filed 1989·Granted Apr 23, 1991·3 cites·15 claims
- 2433US4029637AAcid dyeable polyester containing 1,8-bis-(dialkyl-amino)naphthalaneAKZONA INC·Filed 1975·Granted Jun 14, 1977·1 cites·8 claims
- 2531US4908264AComposites comprising an aramid matrixAKZO NV·Filed 1988·Granted Mar 13, 1990·1 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →