Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5047436 | Method of improving foam fire resistance through the introduction of inorganic particles thereinto | Francis U. Hill | 1991-09-10 |
| 5011558 | Method of improving foam fire resistance through the introduction of inorganic particles thereinto | Francis U. Hill | 1991-04-30 |
| 4962132 | Method of improving foam fire resistance through the introduction of inorganic particles thereinto | Francis U. Hill | 1990-10-09 |
| 4874648 | Method of making flame resistant polyimide foam insulation and the resulting insulation | Francis V. Hill | 1989-10-17 |