Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4716424 | Pressure-sensitive or heat-sensitive recording material | Hermann Nachbur, Albert Wurmli | 1987-12-29 |
| 4411450 | Chromogenic propenylenesulfone compounds | — | 1983-10-25 |
| 4369326 | Carbazolylmethane compounds | Peter Burri | 1983-01-18 |
| 4349218 | Copying material employing fluoran color formers | Robert Garner | 1982-09-14 |
| 4316621 | Pressure-sensitive or heat-sensitive recording material | — | 1982-02-23 |
| 4316036 | Benzopyranothiazoles | — | 1982-02-16 |
| 4309047 | Pressure-sensitive or heat-sensitive recording material | — | 1982-01-05 |
| 4302393 | Fluoran compounds | Robert Garner | 1981-11-24 |
| 4295663 | 3-Indolyl-3-bis-amino-phenyl-phthalide compounds | Robert Garner | 1981-10-20 |
| 4291901 | Pressure-sensitive or heat-sensitive recording material | — | 1981-09-29 |
| 4287336 | Chromogenic propenylenesulfone compounds | — | 1981-09-01 |
| 4281855 | Pressure-sensitive or heat-sensitive recording material and novel 2,2-diarylchromeno compounds used therein | — | 1981-08-04 |
| 4275005 | Carbazolylmethane compounds | Peter Burri | 1981-06-23 |
| 4269978 | Thiazolylphthalide compounds | — | 1981-05-26 |
| 4254032 | Carbazolylmethane compounds | Peter Burri | 1981-03-03 |
| 4252975 | 3-Indolyl-3-bis-amino-phenyl-phthalide compounds | Robert Garner | 1981-02-24 |
| 4187233 | Pressure-sensitive or heat-sensitive recording material and novel 2,2-diarylchromeno compounds used therein | — | 1980-02-05 |
| 4186134 | 3-Indolyl-3-phenyl-phthalides | Robert Garner | 1980-01-29 |
| 4183553 | Pressure- or heat-sensitive recording material and novel chromano compounds used therein | — | 1980-01-15 |