Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888026 | Use of hydroxynaphthoquinones for dyeing human keratin fibres | Gerard Lang, Michel Hocquaux, Jean F. Grollier, Georges Rosenbaum | 1989-12-19 |
| 4876381 | Naphthalene derivatives possessing a retinoid-type action, processes for their preparation, and medicinal and cosmetic compositions containing these derivatives | Gerard Lang, Jean Maignan, Serge Restle, Alain Lagrange, Braham Shroot | 1989-10-24 |
| 4867964 | Cosmetic composition containing hydroxylated chalcone derivatives and its use for protecting the skin and the hair against luminous radiations, new hydroxylated chalcone derivatives employed and process for their preparation | Claudine Moire, Gerard Lang | 1989-09-19 |
| 4866159 | Polyaminoamides which filter ultraviolet radiation, process for their preparation and their use in the protection of the skin and hair | Gerard Lang, Edith Sainte Beuve | 1989-09-12 |
| 4839160 | Polymers capable of absorbing ultraviolet radiation, their preparation and their use in cosmetic compositions | Claude Mahieu | 1989-06-13 |
| 4828819 | Compositions containing bis-(quaternary ammonium) derivatives for the treatment of keratin materials and natural non-keratin or synthetic textile materials | Gerard Land | 1989-05-09 |