Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5057276 | Process for the preparation of reagent layers containing hydrophobic reagents | Gunter Helling, Wolfgang Himmelmann, Gary M. Oosta, Helmut Reiff, Alexander Riebel | 1991-10-15 |
| 4948634 | Process for troublefree coating of hydrophobic materials with polyurethanes | Walther Cohnen, Alexander Riebel | 1990-08-14 |
| 4865940 | Photographic recording material | Gunther Schenk | 1989-09-12 |
| 4845024 | Hardeners for proteins, a binder layer hardened therewith and a photographic recording material containing such a layer | Wolfgang Himmelmann, Johannes Sobel, Hans Ohlschlager | 1989-07-04 |
| 4840890 | Hardened proteinic binder layer | Hans Ohlschlager, Johannes Sobel | 1989-06-20 |
| 4810628 | Color photographic recording material capable of being developed by heat treatment | Gunther Schenk | 1989-03-07 |
| 4808529 | Enzymes immobilized on polyamides or cellulose hydrate | Peter Doppelfeld, Gary M. Oosta, Alexander Riebel | 1989-02-28 |
| 4770970 | Photographic heat development process and auxiliary sheet suitable therein | Gunther Schenk | 1988-09-13 |
| 4740446 | Heat development process and color photographic recording material suitable for this process | Gunther Schenk | 1988-04-26 |
| 4732839 | Alkali metal alginate surface layer for heat development process | Gunther Schenk | 1988-03-22 |
| 4689286 | Color photographic recording material developable by heat treatment | Gunther Schenk, Hans hlschlager | 1987-08-25 |
| 4617256 | Color photographic color coupler-containing recording material | Friedrich-Wilhelm Kunitz | 1986-10-14 |
| 4480027 | Photographic recording material for the production of color images to be viewed by reflected light | Erwin Sch/o/ n, Erich Wolff | 1984-10-30 |
| 4438195 | Photographic recording material containing a developer compound | Friedrich-Wilhelm Kunitz | 1984-03-20 |
| 4386155 | Process for the production of photographic images | Peter Bergthaller, Friedrich-Wilhelm Kunitz, Erich Wolff | 1983-05-31 |
| 4379836 | Process for the production of dispersions and photographic materials | Hildegard Schnoring, Gunther Koepke | 1983-04-12 |
| 4378425 | Process for the production of dispersions and photographic materials | Hildegard Schnoring, Gunther Koepke | 1983-03-29 |
| 4369243 | Photographic recording material for diffusion processes and useful non-diffusing sulfilimine compounds | Hans-Heinrich Credner, Wolfgang Lassig | 1983-01-18 |
| 4339515 | Method of stabilizing color photographic materials and a color photographic material | Johannes Sobel | 1982-07-13 |
| 4330606 | Color photographic materials and color photographic images | Johannes Sobel | 1982-05-18 |
| 4322492 | Process for the development of color photographic images with p-dialkylaminoaniline color developers | Friedrich-Wilhelm Kunitz, Walter Puschel | 1982-03-30 |
| 4198239 | Color photographic materials containing an antistain agent | Hans-Heinrich Credner, Rigobert Otto | 1980-04-15 |
| 4183752 | Light-sensitive photographic material | Karl Kuffner, Wolfgang Lassig, Ernst Meier, Erwin Ranz | 1980-01-15 |