Leppard; David G.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Leppard; David G..The latest application filed is for "dimeric bisacylphosphines, oxides and sulfides".
- Leppard; David G. - Marly CH
- Leppard; David G. - Rheinfelden CH
| Patent | Date |
|---|---|
| Dimeric bisacylphosphines, oxides and sulfides Grant 5,723,512 - Leppard , et al. March 3, 1 | 1998-03-03 |
| 2-(2-hydroxy-3-.alpha. cumyl-5-tert nonyl or dodecyl phenyl)-2H- Benzotriazole UV Absorbers Grant 5,607,987 - Winter , et al. March 4, 1 | 1997-03-04 |
| Photographic recording material containing a UV absorber Grant 5,538,840 - Van Toan , et al. July 23, 1 | 1996-07-23 |
| Daylight curing compositions containing bisacylphosphine oxide photoinitiators Grant 5,534,559 - Leppard , et al. July 9, 1 | 1996-07-09 |
| Ink compositions Grant 5,509,957 - Toan , et al. April 23, 1 | 1996-04-23 |
| Photopolymerizable compositions containing an alkylbisacylphosphine oxide Grant 5,472,992 - Leppard , et al. December 5, 1 | 1995-12-05 |
| S-triazine UV absorbers Grant 5,410,048 - Leppard , et al. April 25, 1 | 1995-04-25 |
| Benzoyl-substituted phosphabicycloalkanes and phosphabicycloalkanesulfides as photoinitiators Grant 5,399,782 - Leppard , et al. March 21, 1 | 1995-03-21 |
| Alkylbisacylphosphine oxides Grant 5,399,770 - Leppard , et al. March 21, 1 | 1995-03-21 |
| Inks Grant 5,261,953 - Vieira , et al. * November 16, 1 | 1993-11-16 |
| Phenolic benzothiazole derivatives and their use as corrosion inhibitors Grant 5,097,039 - Braig , et al. March 17, 1 | 1992-03-17 |
| Inks containing a water soluble compound as a stabilizer particularly for ink jet printing Grant 5,089,050 - Vieira , et al. February 18, 1 | 1992-02-18 |
| Novel 2-(2-hydroxyphenyl)-benzotriazole derivatives, substituted by branched long chain alkyl groups containing ester moieties Grant 4,996,326 - Leppard , et al. February 26, 1 | 1991-02-26 |
| Dibenzoxaphosphorin compounds Grant 4,732,997 - Tschopp , et al. March 22, 1 | 1988-03-22 |
| Color-photographic recording material Grant 4,517,283 - Leppard , et al. May 14, 1 | 1985-05-14 |
| Color photographic materials containing stabilizers Grant 4,430,425 - Leppard February 7, 1 | 1984-02-07 |
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