Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6548456 | Metal working fluids | Hendrik Mulder, Robertus Petrus Jozef Maria Smits | 2003-04-15 |
| 5162551 | Process for the preparation of dihydropyrans | Jogchum J. Hofma | 1992-11-10 |
| 4843061 | Cyclohexane-, cyclohexene- and cyclohexadiene-, bicyclo (2.2.1)-heptenecarboxylic acid esters, and also perfume compositions and perfumed products which contain one or more of said compounds as perfume component | Jan G. Witteveen, Antonius J. A. van der Weerdt | 1989-06-27 |
| 4760050 | Isopropyl-methyl-butenoyl-cyclohexanes, -cyclohexenes and -cyclohexadienes, and also perfume compositions and perfumed articles and materials which contain said compounds as a perfume ingredient | Antonius J. A. van der Weerdt, Jan G. Witteveen | 1988-07-26 |
| 4689175 | Perfume compositions and perfumed articles and materials which contain derivatives of m-cresol as perfume component | — | 1987-08-25 |
| 4650604 | Perfume composition and perfumed products which contain one or more O-alkoxyphenols as perfume component | Antonius J. A. van der Weerdt | 1987-03-17 |
| 4643844 | Perfume compositions and perfumed articles containing dihydro- and/or tetrahydro-naphthols as fragrance material | Antonius J. A. van der Weerdt, Jogchum J. Hofma | 1987-02-17 |