Issued Patents All Time
Showing 51–75 of 88 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4485242 | 3[(Alkoxy)(4-aminophenyl, 1-naphthyl or 1-biphenylyl)methyl]1H-indoles | William M. Hung | 1984-11-27 |
| 4477676 | 4-(3-Indolyl)-2,3-dichloro-4-oxo-2-butenoic acids | Nathan N. Crounse | 1984-10-16 |
| 4451657 | 3,5- And 5,5-bis(3-indolyl)-2-(5H)furanones | Nathan N. Crounse | 1984-05-29 |
| 4446321 | 4-Aryl-bis 2,6-(aminophenyl)pyridines | William M. Hung | 1984-05-01 |
| 4431819 | 3-(Pyrrolo and 3-indolyl)-3-diphenylamino substituted phthalides | William M. Hung | 1984-02-14 |
| 4417059 | Diphenylamino and indolyl substituted pyromellitides | William M. Hung | 1983-11-22 |
| 4414399 | 5/6 Carboxyphthalides | William M. Hung | 1983-11-08 |
| 4403791 | Carbonless duplicating and marking systems | William M. Hung | 1983-09-13 |
| 4399291 | Process for the production of substituted aminophthalides | Patrick J. Jefferies | 1983-08-16 |
| 4398030 | 3-[(Substituted-amino)(aryl)methyl]-1H-indoles | William M. Hung | 1983-08-09 |
| 4396767 | 2,6-Bis(heteroaryl)pyridines | William M. Hung | 1983-08-02 |
| 4377698 | 2,4 Bis(2-indolyl-3)-4-oxobutanoic acids | Nathan N. Crounse | 1983-03-22 |
| 4363503 | Pyridine color formers | William M. Hung | 1982-12-14 |
| 4351768 | 2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids | Nathan N. Crounse | 1982-09-28 |
| 4343493 | Duplicating and marking systems | William M. Hung | 1982-08-10 |
| 4341402 | Systems employing indole color formers | William M. Hung | 1982-07-27 |
| 4337340 | Processes for preparing substituted furopyridinones and furopyrazinones | William M. Hung | 1982-06-29 |
| 4322352 | Indolyl phthalide compounds | Nathan N. Crounse | 1982-03-30 |
| 4321369 | Compositions, process and systems | William M. Hung | 1982-03-23 |
| 4307898 | Carbonless duplicating and marking systems | William M. Hung | 1981-12-29 |
| 4307018 | Heteroarylphthalides | Nathan N. Crounse | 1981-12-22 |
| 4298215 | Carbonless duplicating and marking systems | William M. Hung | 1981-11-03 |
| 4283077 | Indole color former | William M. Hung | 1981-08-11 |
| 4274660 | Carbonless duplicating and marking systems | William Mo-Wei Hung | 1981-06-23 |
| 4275121 | Carbonless duplicating and marking systems utilizing indolyl-substituted furanone color formers | Nathan N. Crounse | 1981-06-23 |