Process to yield foam construction boards with low surface irregularities
US-12358190-B1 · Jul 15, 2025 · US
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Letts John B patents
Letts John B is listed as an inventor on 36 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Letts John B |
| Total patents | 36 |
| First publication | Dec 22, 2016 |
| Latest publication | Jul 15, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Process for producing isocyanate-based foam construction boards
US-2025222636-A1 · Jul 10, 2025 · US
Construction boards with foil-containing facers
US-12337581-B2 · Jun 24, 2025 · US
Process for encapsulating fragile insulation materials within polyisocyanurate
US-12305385-B2 · May 20, 2025 · US
Isocyanate-based foam construction boards
US-12291620-B2 · May 6, 2025 · US
Process for producing isocyanate-based foam construction boards
US-12263622-B1 · Apr 1, 2025 · US
Process for producing isocyanate-based foam construction boards
US-2024327592-A1 · Oct 3, 2024 · US
Process for producing isocyanate-based foam construction boards
US-12006414-B2 · Jun 11, 2024 · US
Foam construction boards with enhanced fire performance
US-2024149551-A1 · May 9, 2024 · US
Polyisocyanurate coverboards with improved fire resistance
US-11913222-B2 · Feb 27, 2024 · US
Recent patents
Latest publications not already listed above.
Encapsulated fragile insulation materials
US-2023234323-A1 · Jul 27, 2023 · US
Encapsulated fragile insulation materials
US-11618235-B2 · Apr 4, 2023 · US
Process for producing isocyanate-based foam construction boards
US-2022251320-A1 · Aug 11, 2022 · US
Polyisocyanurate coverboards with improved fire resistance
US-2022154453-A1 · May 19, 2022 · US
Construction boards with foil-containing facers
US-2022088899-A1 · Mar 24, 2022 · US
Process for producing isocyanate-based foam construction boards
US-2022056234-A1 · Feb 24, 2022 · US
Polyisocyanurate coverboards with improved fire resistance
US-11242681-B2 · Feb 8, 2022 · US
Encapsulated fragile insulation materials
US-2022001642-A1 · Jan 6, 2022 · US
Adhesive-backed composite insulation boards with vacuum-insulated capsules
US-2021198527-A1 · Jul 1, 2021 · US
Polyisocyanurate coverboards with improved fire resistance
US-2021108408-A1 · Apr 15, 2021 · US
Isocyanate-based foam construction boards
US-2021095090-A1 · Apr 1, 2021 · US
Isocyanate-based foam construction boards
US-10870987-B1 · Dec 22, 2020 · US
High density polyurethane and polyisocyanurate construction boards and composite boards
US-2020299968-A1 · Sep 24, 2020 · US
Process for encapsulating fragile insulation materials within polyisocyanurate
US-2020206988-A1 · Jul 2, 2020 · US
Process for encapsulating fragile insulation materials within polyisocyanurate
US-10611066-B2 · Apr 7, 2020 · US
Foam construction boards with enhanced fire performance
US-2020055275-A1 · Feb 20, 2020 · US
Process for producing isocyanate-based foam construction boards
US-2020017654-A1 · Jan 16, 2020 · US
Process for producing isocyanate-based foam construction boards
US-2019225766-A1 · Jul 25, 2019 · US
High density polyurethane and polyisocyanurate construction boards and composite boards
US-2019194947-A1 · Jun 27, 2019 · US
Adhesive-backed composite insulation boards with vacuum-insulated capsules
US-2019186124-A1 · Jun 20, 2019 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Firestone Building Prod Co Llc | 27 |
| Holcim Technology Ltd | 12 |
| Letts John B | 1 |
| Tackett Timothy | 1 |
| Sopko Allen | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| B32B2266/0278 | 32 |
| B32B2419/06 | 27 |
| B32B5/18 | 25 |
| B32B2307/3065 | 20 |
| E04C2/205 | 20 |