Issued Patents 2025
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12358190 | Process to yield foam construction boards with low surface irregularities | John B. Letts, Mark Holtman | 2025-07-15 |
| 12291620 | Isocyanate-based foam construction boards | John B. Letts, Michael J. Hubbard | 2025-05-06 |
| 12263622 | Process for producing isocyanate-based foam construction boards | John B. Letts | 2025-04-01 |