Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4576905 | Photographically useful chalcogenazoles, chalcogenazolines, and chalcogenazolinium and chalcogenazolium salts | Ronald E. Leone, Rosemary Przyklek | 1986-03-18 |
| 4575483 | Photographically useful chalcogenazolium polymethine dyes | John D. Mee | 1986-03-11 |
| 4197242 | Potassium phthalocyanine complexes, method of preparation, and phthalocyanine purification processes | — | 1980-04-08 |