Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251414 | Aqueous formulation for pretanning raw hides | Alain Lauton, Markus Hess, Gunter Streicher | 2001-06-26 |
| 5705083 | Stabilizing leather against thermal and photochemical decomposition | Franz Wyss, Vladimir Arnold, Helena Dbaly, Gisbert Leuschner, Manfred Rembold | 1998-01-06 |
| 5486213 | Process for the dyeing of leather with dye mixtures | Peter Moser, Campbell Page | 1996-01-23 |
| 5427594 | Process for pickling raw hides | Alain Lauton, Markus Hess, Gunter Streicher | 1995-06-27 |
| 5376147 | Process for dyeing leather with dye mixtures | Campbell Page, Peter Moser | 1994-12-27 |
| 5360453 | Process for pickling and pretanning raw hides | Alain Lauton, Markus Hess, Gunter Streicher | 1994-11-01 |
| 5354341 | Process for dyeing leather with dye mixtures | Peter Moser, Thomas P. Campbell | 1994-10-11 |
| 5264000 | Aqueous solutions of synthetic tanning agents | Alain Lauton | 1993-11-23 |
| 5229502 | Preparation of 1:2 chromium complexes one sulfo substituted and one sulfonamido or the like substituted azo dyes | Gerhard Back | 1993-07-20 |
| 5204453 | Process for the preparation of 1:2 metal complex azo compounds by carrying out diazotization and coupling in the presence of a metal donor | Bernard Chambon, Horst Jager, Rudiger Oxenius | 1993-04-20 |
| 5176717 | Use of sulfonated polyazo dyes for dyeing leather in brilliant fast red shades | Rudolf Schaulin, Peter Moser | 1993-01-05 |
| 5152801 | Process for dyeing leather with an aqueous bath containing sulfonated carbon black and black anionic dye | Hans Altermatt, Peter Moser, Ernst Tempel | 1992-10-06 |
| 5023274 | Fibre-reactive formazan dyes containing .beta.-halogenethyl or vinylsulfonyl-alkanoylamino fiber-reactive groups | Urs Lehmann, Peter Scheibli, Josef Koller | 1991-06-11 |
| 5003051 | Process for the preparation of metallizable monoazo dyes in the presence of ketones | Ulrich Schlesinger, Peter Loew | 1991-03-26 |
| 4996303 | Preparation of 1:2 metal complex dyes by coupling in the presence of a metal donor in an inert gas atmosphere | Daniel Parisot | 1991-02-26 |
| 4962191 | 1:2 chromium or cobalt complex axo dyes containing at least one 2-aryl-4-amino-6-hydroxypyrimidine radical | Kurt Burdeska | 1990-10-09 |
| 4923973 | 1:2 Cobalt complexes of disazo dyes | — | 1990-05-08 |
| 4904767 | Asymmetric 1:2-chrome complexes of benzene-azo-naphthalene/naphthalene-azo-naphthalene acid dyes for leather | Fabio Beffa, Peter Loew | 1990-02-27 |
| 4874849 | Asymmetric 1:2-chromium complex dyes containing two azo dyes, one containing an acetoacetanilide coupling component | Gerhard Back, Fabic Beffa, Ulrich Schlesinger | 1989-10-17 |
| 4836827 | Tris-azo black or grey dyes for leather or pelts | — | 1989-06-06 |
| 4818246 | Process for improving the light-fastness of leather dyeings | Gerhard Back, Josef Koller | 1989-04-04 |
| 4801695 | Iron complexes of azo dyes obtained from naphthylsulfonic acid, resorcinol and nitroaminophenol | — | 1989-01-31 |
| 4652269 | Process for the continuous trichromatic dyeing of synthetic polyamide materials: including a blue anthraquinone reactive dye | James B. Bowles, Marshall S. White, Jean-Marie Adam, Peter Loew | 1987-03-24 |
| 4625017 | Metal complexes of azo dyes containing a 2-(P-N-aceloacetylaminophenyl) benzothiozole moiety | — | 1986-11-25 |
| 4519802 | Use of 1:2 cobalt complex dyes for dyeing leather or furs | — | 1985-05-28 |