Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5225310 | Photosensitive mixture containing an ester or amide of 1,2-naphthoquinone diazide sulfonic or carboxylic acid, a phenolic binder resin and a bis-(4-hydroxyphenyl) speed enhancing compound | Otfried Gaschler | 1993-07-06 |
| 5149613 | Process for producing images on a photosensitive material | Dieter Mohr | 1992-09-22 |
| 5143815 | Light-sensitive mixture based on 1,2-naphthoquinone-diazides, and reproduction material produced with this mixture | — | 1992-09-01 |
| 5084372 | Process for preparing photographic elements utilizing light-sensitive layer containing cyclical acid amide thermo-crosslinking compound | Shane Hsieh | 1992-01-28 |
| 5070001 | Light-sensitive mixture for producing positive or negative relief copies | — | 1991-12-03 |
| 5017462 | Process of producing negative relief copies utilizing photosensitive copying material with thermal hardening triazine compound | — | 1991-05-21 |
| 5008175 | Copying materials | Shane Hsieh | 1991-04-16 |
| 4990429 | Process for the production of negative relief copies utilizing reversal processing | Hans W. Frass | 1991-02-05 |
| 4983478 | Burn-in gumming composition for offset printing plates | Dieter Mohr | 1991-01-08 |
| 4889788 | Photosensitive composition, photosensitive copying material prepared from this composition with thermal hardening symmetric triazine alkyl(aryl)-ether | Hans W. Frass | 1989-12-26 |
| 4889789 | Photosensitive composition and photosensitive copying material prepared therefrom wherein composition has a thermal crosslinking urethane formaldehyde condensate | — | 1989-12-26 |
| 4885230 | Burn-in gumming composition for offset printing plates | Dieter Mohr | 1989-12-05 |
| 4786581 | Gumming solution for use in the burning-in of offset-printing plates comprising water, a hydrophilic polymer and an organic acid derivative | Loni Schell | 1988-11-22 |
| 4717640 | Light-sensitive mixture, recording material prepared therefrom and process for use thereof | — | 1988-01-05 |
| 4642282 | Light-sensitive positive copying material with alkali soluble polycondensation binder | — | 1987-02-10 |
| 4639406 | Light-sensitive compound, light-sensitive mixture, and light-sensitive copying material prepared therefrom with 0-naphthoquinone diazide compound | — | 1987-01-27 |
| 4628020 | Light-sensitive compound mixture and copying material comprising o-naphthquinonediazide compound | — | 1986-12-09 |
| 4594306 | Light-sensitive copying material with o-quinone diazide and phenolic hydroxy compound | Rainer Beutel | 1986-06-10 |
| 4581321 | Process for producing negative copies in a material based on 1,2-quinone diazides with thermal curing agent | — | 1986-04-08 |
| 4576901 | Process for producing negative copies by means of a material based on 1,2-quinone diazides with 4-ester or amide substitution | Gerhard Mack | 1986-03-18 |
| 4560636 | Light-sensitive, positive-working copying material having a rough surface provided by pigments in light-sensitive layer | — | 1985-12-24 |
| 4517275 | Light-sensitive mixture based on O-naphthoquinone-diazides, and light-sensitive copying material prepared therefrom | — | 1985-05-14 |
| 4457999 | Light-sensitive 1,2 quinone diazide containing mixture and light-sensitive copying material prepared therefrom wherein imaged produced therein is visible under yellow safety light | — | 1984-07-03 |
| 4458000 | Light-sensitive mixture and light-sensitive copying material prepared therefrom wherein image produced therein is visible under yellow safety light | — | 1984-07-03 |
| 4439511 | Light-sensitive mixture based on O-naphthoquinone diazide ester of condensate of bisphenol and formaldehyde and light-sensitive copying material prepared therefrom | — | 1984-03-27 |