Issued Patents All Time
Showing 51–71 of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4417059 | Diphenylamino and indolyl substituted pyromellitides | Paul Schmidt | 1983-11-22 |
| 4414399 | 5/6 Carboxyphthalides | Paul Schmidt | 1983-11-08 |
| 4403791 | Carbonless duplicating and marking systems | Paul Schmidt | 1983-09-13 |
| 4398030 | 3-[(Substituted-amino)(aryl)methyl]-1H-indoles | Paul Schmidt | 1983-08-09 |
| 4396767 | 2,6-Bis(heteroaryl)pyridines | Paul Schmidt | 1983-08-02 |
| 4363503 | Pyridine color formers | Paul Schmidt | 1982-12-14 |
| 4343493 | Duplicating and marking systems | Paul Schmidt | 1982-08-10 |
| 4341402 | Systems employing indole color formers | Paul Schmidt | 1982-07-27 |
| 4337340 | Processes for preparing substituted furopyridinones and furopyrazinones | Paul Schmidt | 1982-06-29 |
| 4321369 | Compositions, process and systems | Paul Schmidt | 1982-03-23 |
| 4307898 | Carbonless duplicating and marking systems | Paul Schmidt | 1981-12-29 |
| 4298215 | Carbonless duplicating and marking systems | Paul Schmidt | 1981-11-03 |
| 4283077 | Indole color former | Paul Schmidt | 1981-08-11 |
| 4257954 | Novel compounds, processes and marking systems | Paul Schmidt | 1981-03-24 |
| 4255577 | Process and intermediates for preparing 3-[4-(disubstituted-amino)phenyl] o r | Paul Schmidt | 1981-03-10 |
| 4251092 | Pressure sensitive carbonless duplicating systems and thermal marking systems | Paul Schmidt | 1981-02-17 |
| 4243250 | Carbonless duplicating systems | Paul Schmidt | 1981-01-06 |
| 4211872 | Substituted furopyridinones and furopyrazinones | Paul Schmidt | 1980-07-08 |
| 4200313 | Carbonless duplicating systems | Paul Schmidt | 1980-04-29 |
| 4187223 | 3-[4-(Disubstituted-amino)phenyl]-3-(diphenylamino)phthalides | Paul Schmidt | 1980-02-05 |
| 4182714 | Carbazole containing phthalides | Paul Schmidt | 1980-01-08 |