Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5308388 | Fountain solution for offset printing | — | 1994-05-03 |
| 5096487 | Fountain composition for use in offset printing | — | 1992-03-17 |
| 4786581 | Gumming solution for use in the burning-in of offset-printing plates comprising water, a hydrophilic polymer and an organic acid derivative | Paul Stahlhofen | 1988-11-22 |
| 4748098 | Emulsion for post-treating planographic printing plates prepared by electrophotographic means and process for producing the printing plates | — | 1988-05-31 |
| 4579811 | Process for developing exposed diazo negative-working reproduction layers using aqueous developer having salt of aromatic carboxylic acid with adjacent group substituent | Werner Frass, Inge Gros | 1986-04-01 |
| 4530897 | Process for desensitizing diazo lithographic printing forms using desensitizing solution with light absorbing compound | Gunter Berghaeuser, Werner Frass | 1985-07-23 |
| 4416976 | Developer solution for the development of exposed negative-working diazonium salt layers | — | 1983-11-22 |
| 4388391 | Process for the manufacture of a lithographic printing form by electrophotography | — | 1983-06-14 |
| 4349391 | Process for preserving planographic printing forms | — | 1982-09-14 |
| 4265999 | Process for the preparation of planographic printing forms | — | 1981-05-05 |