Inventor
LETTS JOHN B
US28 patents
⚠️ This page may combine multiple inventors who share the name “LETTS JOHN B”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOLCIM TECHNOLOGY LTD
6 patentsUS12291620B2May 6, 2025
Isocyanate-based foam construction boards
HOLCIM TECHNOLOGY LTD0 citations62
US11913222B2Feb 27, 2024
Polyisocyanurate coverboards with improved fire resistance
HOLCIM TECHNOLOGY LTD0 citations62
US11618235B2Apr 4, 2023
Encapsulated fragile insulation materials
HOLCIM TECHNOLOGY LTD0 citations62
US12358190B1Jul 15, 2025
Process to yield foam construction boards with low surface irregularities
HOLCIM TECHNOLOGY LTD0 citations55
US12006414B2Jun 11, 2024
Process for producing isocyanate-based foam construction boards
HOLCIM TECHNOLOGY LTD0 citations52
US12263622B1Apr 1, 2025
Process for producing isocyanate-based foam construction boards
HOLCIM TECHNOLOGY LTD0 citations51
FIRESTONE BUILDING PROD CO LLC
5 patentsUS10870987B1Dec 22, 2020
Isocyanate-based foam construction boards
FIRESTONE BUILDING PROD CO LLC7 citations84
US12337581B2Jun 24, 2025
Construction boards with foil-containing facers
FIRESTONE BUILDING PROD CO LLC0 citations62
US12305385B2May 20, 2025
Process for encapsulating fragile insulation materials within polyisocyanurate
FIRESTONE BUILDING PROD CO LLC0 citations62
US11242681B2Feb 8, 2022
Polyisocyanurate coverboards with improved fire resistance
FIRESTONE BUILDING PROD CO LLC0 citations62
US10611066B2Apr 7, 2020
Process for encapsulating fragile insulation materials within polyisocyanurate
FIRESTONE BUILDING PROD CO LLC1 citations62
BRIDGESTONE FIRESTONE INC
4 patentsUS5891563AApr 6, 1999
Polyisocyanurate boards with reduced moisture absorbency and lower air permeability and related methods
BRIDGESTONE FIRESTONE INC104 citations98
US6044604AApr 4, 2000
Composite roofing members having improved dimensional stability and related methods
BRIDGESTONE FIRESTONE INC194 citations96
US5735092AApr 7, 1998
Composite roofing members having improved dimensional stability and related methods
BRIDGESTONE FIRESTONE INC151 citations96
US6117375ASep 12, 2000
Roofing members without auxiliary facers and related methods
BRIDGESTONE FIRESTONE INC101 citations92
LETTS JOHN B
4 patentsUS7972688B2Jul 5, 2011
High density polyurethane and polyisocyanurate construction boards and composite boards
LETTS JOHN B37 citations88
US8106106B2Jan 31, 2012
Insulation boards and methods for their manufacture
LETTS JOHN B7 citations83
US8142903B2Mar 27, 2012
Construction boards with improved facers
LETTS JOHN B8 citations79
US9856651B2Jan 2, 2018
Fastening plate assembly
LETTS JOHN B2 citations69
BFS DIVERSIFIED PRODUCTS LLC
3 patentsUS7612120B2Nov 3, 2009
Insulation boards and methods for their manufacture
BFS DIVERSIFIED PRODUCTS LLC34 citations92
US7838568B2Nov 23, 2010
Insulation boards and methods for their manufacture
BFS DIVERSIFIED PRODUCTS LLC23 citations89
US7205374B2Apr 17, 2007
Two-part polyurethane adhesive for bonding insulation boards to a roof deck
BFS DIVERSIFIED PRODUCTS LLC3 citations62