Issued Patents All Time
Showing 26–50 of 129 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6159485 | N-acetyl aldosamines, n-acetylamino acids and related n-acetyl compounds and their topical use | Ruey J. Yu | 2000-12-12 |
| 6060512 | Method of using hydroxycarboxylic acids or related compounds for treating skin changes asociated with intrinsic and extrinsic aging | Ruey J. Yu | 2000-05-09 |
| 6054479 | Preservative compositions and methods for using the same | Ruey J. Yu | 2000-04-25 |
| 6051609 | Additives enhancing the effect of therapeutic agents | Ruey J. Yu | 2000-04-18 |
| 6046238 | Method for treating or preventing the spread of acne vulgaris | Ruey J. Yu | 2000-04-04 |
| 5962526 | Pharmaceutical compositions containing hydroxycarboxylic acids and/or ketocarboxylic acids and methods of using same | Ruey J. Yu | 1999-10-05 |
| 5958975 | Antiodor, antimicrobial and preservative compositions and methods of using same | Ruey J. Yu | 1999-09-28 |
| 5942250 | Compositions and methods for enhancing the topical effects of sunscreen agents | Ruey J. Yu | 1999-08-24 |
| 5889054 | Method of using beta hydroxy acids for treating wrinkles | Ruey J. Yu | 1999-03-30 |
| 5886042 | Amphoteric compostion and polymeric forms of alpha hydroxyacids, and their therapeutic use | Ruey J. Yu | 1999-03-23 |
| 5886041 | Amphoteric compositions and polymeric forms of alpha hydroxyacids, and their therapeutic use | Ruey J. Yu | 1999-03-23 |
| 5883128 | Amphoteric compositions and polymeric forms of alpha hydroxyacids, and their therapeutic use | Ruey J. Yu | 1999-03-16 |
| 5877212 | Molecular complex and control-release of alpha hydroxyacids | Ruey J. Yu | 1999-03-02 |
| 5874071 | Antiodor, antimicrobial and preservative compositions and methods of using same | Ruey J. Yu | 1999-02-23 |
| 5856357 | Method for treating wrinkles using certain alpha hydroxyacids | Ruey J. Yu | 1999-01-05 |
| 5834510 | Compositions comprising 2-hydroxycarboxylic acids and related compounds, and methods for alleviating signs of dermatological aging | Ruey J. Yu | 1998-11-10 |
| 5827882 | Method of using ethyl pyruvate for treating wrinkles | Ruey J. Yu | 1998-10-27 |
| 5807890 | Antiodor, antimicrobial and preservative compositions and methods of using same | Ruey J. Yu | 1998-09-15 |
| 5716992 | Method of using mucic acid or mucolactone for treating wrinkles | Ruey J. Yu | 1998-02-10 |
| 5702688 | Amphoteric compositions and polymeric forms of alpha hydroxyacids, and their therapeutic use | Ruey J. Yu | 1997-12-30 |
| 5690967 | Compositions for improved topical delivery of lactic acid | Ruey J. Yu | 1997-11-25 |
| 5691378 | Method for treating wrinkles using combinations of alpha hydroxyacids and/or alpha ketoacids | Ruey J. Yu | 1997-11-25 |
| 5686489 | Alpha hydroxyacid esters for skin aging | Ruey J. Yu | 1997-11-11 |
| 5684044 | Methods for improved topical delivery of lactic acid | Ruey J. Yu | 1997-11-04 |
| 5681853 | Methods for improved topical delivery of alpha hydroxyacids | Ruey J. Yu | 1997-10-28 |