Won; Richard
Patent Applications and Registrations
Patent applications and USPTO patent grants for Won; Richard.The latest application filed is for "methods and compositions for topical delivery of retinoic acid".
- Won; Richard - Palo Alto CA
| Patent | Date |
|---|---|
| Methods and compositions for topical delivery of retinoic acid Grant 5,955,109 - Won , et al. September 21, 1 | 1999-09-21 |
| Ionic beads useful for controlled release and adsorption Grant 5,871,722 - Nacht , et al. February 16, 1 | 1999-02-16 |
| Ionic beads for controlled release and adsorption Grant 5,840,293 - Nacht , et al. November 24, 1 | 1998-11-24 |
| Two step method for preparation of controlled release formulations Grant 5,145,675 - Won September 8, 1 | 1992-09-08 |
| Method for delivering an active ingredient by controlled time release utilizing a novel delivery vehicle which can be prepared by a process utilizing the active ingredient as a porogen Grant 4,690,825 - Won September 1, 1 | 1987-09-01 |
| Highly adsorptive macroporous polymers Grant 4,307,201 - Won , et al. December 22, 1 | 1981-12-22 |
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