Inventor · disambiguated record
John B. Letts
Also filed as: LETTS JOHN · LETTS JOHN B
34 granted patents·33 pending applications·802 citations·filing 1984–2025
97Inventor score
Files withFIRESTONE BUILDING PROD CO LLC26HOLCIM TECHNOLOGY LTD11LETTS JOHN B7BFS DIVERSIFIED PRODUCTS LLC5BRANDT GREGORY A4
Top patents by PatentIndex Score
67 records- 0195US10000922B1Construction boards with coated inorganic facerFIRESTONE BUILDING PROD CO LLC·Filed 2014·Granted Jun 19, 2018·14 cites·17 claims
- 0295US7972688B2High density polyurethane and polyisocyanurate construction boards and composite boardsLETTS JOHN B·Filed 2006·Granted Jul 5, 2011·37 cites·36 claims
- 0395US6044604AComposite roofing members having improved dimensional stability and related methodsBRIDGESTONE FIRESTONE INC·Filed 1998·Granted Apr 4, 2000·194 cites·17 claims
- 0494US5891563APolyisocyanurate boards with reduced moisture absorbency and lower air permeability and related methodsBRIDGESTONE FIRESTONE INC·Filed 1996·Granted Apr 6, 1999·104 cites·10 claims
- 0593US7612120B2Insulation boards and methods for their manufactureBFS DIVERSIFIED PRODUCTS LLC·Filed 2003·Granted Nov 3, 2009·34 cites·4 claims
- 0693US5735092AComposite roofing members having improved dimensional stability and related methodsBRIDGESTONE FIRESTONE INC·Filed 1996·Granted Apr 7, 1998·151 cites·15 claims
- 0792US8106106B2Insulation boards and methods for their manufactureLETTS JOHN B·Filed 2010·Granted Jan 31, 2012·7 cites·13 claims
- 0891US7387753B2Method and apparatus to monitor the compressive strength of insulation boardsBFS DIVERSIFIED PRODUCTS LLC·Filed 2004·Granted Jun 17, 2008·39 cites·6 claims
- 0990US11174364B2Process for producing isocyanate-based foam construction boardsFIRESTONE BUILDING PROD CO LLC·Filed 2016·Granted Nov 16, 2021·2 cites·8 claims
- 1090US6117375ARoofing members without auxiliary facers and related methodsBRIDGESTONE FIRESTONE INC·Filed 1998·Granted Sep 12, 2000·101 cites·8 claims
- 1190US2024309160A1Process for producing isocyanate-based foam construction boardsHOLCIM TECHNOLOGY LTD·Filed 2024·Application pending·0 cites
- 1288US10870987B1Isocyanate-based foam construction boardsFIRESTONE BUILDING PROD CO LLC·Filed 2018·Granted Dec 22, 2020·7 cites·14 claims
- 1384US7838568B2Insulation boards and methods for their manufactureBFS DIVERSIFIED PRODUCTS LLC·Filed 2003·Granted Nov 23, 2010·23 cites·37 claims
- 1483US8453390B2High density polyurethane and polyisocyanurate construction boards and composite boardsLETTS JOHN·Filed 2008·Granted Jun 4, 2013·19 cites·31 claims
- 1582US8142903B2Construction boards with improved facersLETTS JOHN B·Filed 2008·Granted Mar 27, 2012·8 cites·14 claims
- 1680US12263622B1Process for producing isocyanate-based foam construction boardsHOLCIM TECHNOLOGY LTD·Filed 2022·Granted Apr 1, 2025·0 cites·14 claims
- 1780US11999833B2Process for producing isocyanate-based foam construction boardsHOLCIM TECHNOLOGY LTD·Filed 2021·Granted Jun 4, 2024·0 cites·8 claims
- 1880US2024149551A1Foam construction boards with enhanced fire performanceHOLCIM TECHNOLOGY LTD·Filed 2024·Application pending·0 cites
- 1979US2022251320A1Process for producing isocyanate-based foam construction boardsFIRESTONE BUILDING PROD CO LLC·Filed 2022·Application pending·0 cites
- 2076US2020299968A1High density polyurethane and polyisocyanurate construction boards and composite boardsFIRESTONE BUILDING PROD CO LLC·Filed 2020·Application pending·0 cites
- 2175US11242681B2Polyisocyanurate coverboards with improved fire resistanceFIRESTONE BUILDING PROD CO LLC·Filed 2020·Granted Feb 8, 2022·0 cites·13 claims
- 2275US4739122APreparation of ketonesUNION CARBIDE CORP·Filed 1985·Granted Apr 19, 1988·12 cites·25 claims
- 2374US2020011050A1Construction boards with coated inorganic facerFIRESTONE BUILDING PROD CO LLC·Filed 2019·Application pending·0 cites
- 2473US10450741B2Construction boards with coated inorganic facerFIRESTONE BUILDING PROD CO LLC·Filed 2018·Granted Oct 22, 2019·0 cites·19 claims
- 2572US11618235B2Encapsulated fragile insulation materialsHOLCIM TECHNOLOGY LTD·Filed 2019·Granted Apr 4, 2023·0 cites·9 claims
- 2672US2025222636A1Process for producing isocyanate-based foam construction boardsHOLCIM TECHNOLOGY LTD·Filed 2025·Application pending·0 cites
- 2772US2018087277A1High density polyurethane and polyisocyanurate construction boards and composite boardsFIRESTONE BUILDING PROD CO LLC·Filed 2017·Application pending·0 cites
- 2872US2024327592A1Process for producing isocyanate-based foam construction boardsHOLCIM TECHNOLOGY LTD·Filed 2024·Application pending·0 cites
- 2970US12358190B1Process to yield foam construction boards with low surface irregularitiesHOLCIM TECHNOLOGY LTD·Filed 2022·Granted Jul 15, 2025·0 cites·18 claims
- 3070US12305385B2Process for encapsulating fragile insulation materials within polyisocyanurateFIRESTONE BUILDING PROD CO LLC·Filed 2020·Granted May 20, 2025·0 cites·8 claims
- 3170US8153039B2Method for producing and monitoring the compressive strength of foam insulation boardTACKETT TIMOTHY·Filed 2008·Granted Apr 10, 2012·1 cites·18 claims
- 3269US11913222B2Polyisocyanurate coverboards with improved fire resistanceHOLCIM TECHNOLOGY LTD·Filed 2022·Granted Feb 27, 2024·0 cites·17 claims
- 3369US7987730B2Method and apparatus to monitor the compressive strength of insulation boardsTACKETT TIMOTHY·Filed 2008·Granted Aug 2, 2011·2 cites·20 claims
- 3469US2019225766A1Process for producing isocyanate-based foam construction boardsFIRESTONE BUILDING PROD CO LLC·Filed 2017·Application pending·0 cites
- 3569US2018320370A1Polyisocyanurate coverboards with improved fire resistanceFIRESTONE BUILDING PROD CO LLC·Filed 2018·Application pending·0 cites
- 3668US2016369510A1High density polyurethane and polyisocyanurate construction boards and composite boardsFIRESTONE BUILDING PROD CO LLC·Filed 2016·Application pending·0 cites
- 3767US12291620B2Isocyanate-based foam construction boardsHOLCIM TECHNOLOGY LTD·Filed 2020·Granted May 6, 2025·0 cites·18 claims
- 3867US2017328062A1Construction boards with coated facersFIRESTONE BUILDING PROD CO LLC·Filed 2017·Application pending·0 cites
- 3966US10611066B2Process for encapsulating fragile insulation materials within polyisocyanurateFIRESTONE BUILDING PROD CO LLC·Filed 2015·Granted Apr 7, 2020·1 cites·8 claims
- 4066US4490559AProcess for making aldehydes from diesters of carbonic acidSHELL OIL CO·Filed 1984·Granted Dec 25, 1984·7 cites·10 claims
- 4166US2020055275A1Foam construction boards with enhanced fire performanceFIRESTONE BUILDING PROD CO LLC·Filed 2018·Application pending·0 cites
- 4265US12006414B2Process for producing isocyanate-based foam construction boardsHOLCIM TECHNOLOGY LTD·Filed 2021·Granted Jun 11, 2024·0 cites·22 claims
- 4365US2013036694A1High density polyurethane and polyisocyanurate construction boards and composite boardsFIRESTONE BUILDING PROD CO LLC·Filed 2012·Application pending·0 cites
- 4465US2020017654A1Process for producing isocyanate-based foam construction boardsFIRESTONE BUILDING PROD CO LLC·Filed 2018·Application pending·0 cites
- 4564US2009326090A1Insulation boards and methods for their manufactureLETTS JOHN B·Filed 2009·Application pending·0 cites
- 4663US9221234B2High density polyurethane and polyisocyanurate construction boards and composite boardsFIRESTONE BUILDING PROD CO LLC·Filed 2013·Granted Dec 29, 2015·0 cites·7 claims
- 4762US2012167509A1High density polyurethane and polyisocyanurate construction boards and composite boardsBRANDT GREGORY A·Filed 2012·Application pending·0 cites
- 4862US2012167510A1High density polyurethane and polyisocyanurate construction boards and composite boardsBRANDT GREGORY A·Filed 2012·Application pending·0 cites
- 4961US5950383AMetal roof sealing system and methodBRIDGESTONE CORP·Filed 1998·Granted Sep 14, 1999·34 cites·18 claims
- 5061US2019194947A1High density polyurethane and polyisocyanurate construction boards and composite boardsFIRESTONE BUILDING PROD CO LLC·Filed 2018·Application pending·0 cites
Showing the top 50 of 67 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →