Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4403062 | Organic pigments | Gavin G. Spence | 1983-09-06 |
| 4403063 | Organic pigments | Gavin G. Spence | 1983-09-06 |
| 4388439 | Wet-strength resin for paper and method of preparing same | — | 1983-06-14 |
| 4369292 | Organic pigments | Gavin G. Spence | 1983-01-18 |
| 4353818 | Organic pigments | Gavin G. Spence | 1982-10-12 |
| 4349641 | Organic pigments | Gavin G. Spence | 1982-09-14 |
| 4348257 | Organic pigments | Gavin G. Spence | 1982-09-07 |
| 4343729 | Organic pigments | Gavin G. Spence | 1982-08-10 |
| 4311809 | Organic pigments | Gavin G. Spence | 1982-01-19 |
| 4293666 | Organic pigments | Gavin G. Spence | 1981-10-06 |
| 4293667 | Organic pigments | Gavin G. Spence | 1981-10-06 |
| 4282060 | Organic pigments | Gavin G. Spence | 1981-08-04 |
| 4281082 | Organic pigments | Gavin G. Spence | 1981-07-28 |
| 4235982 | Organic pigments | Gavin G. Spence | 1980-11-25 |