US3158476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the improvement of fixed electrophotographic printing plates which are water-conductive in the image-free parts
Assignee: Azoplate Corp
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Filing: 1961-11-14
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Granted: 1964-11-24
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Uhlig Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR IMPROVING AN ELECTROPHOTOGRAPHIC PRINTING PLATE HAVING, ON A SUPPORT, A FIXED IMAGE FORMED BY DEVELOPING A LATENT ELECTROSTATIC IMAGE WITH AN ELECTROSCOPIC MATERIAL, THE PLATE BEING HYDROPHILIC IN THE IMAGEFREE AREAS, WHICH COMPRISES COATING THE PLATE WITH AN AQUEOUS COLOIDAL AGENT, WHICH COLLOIDAL AGENT ADHERES TO THE NON-IMAGE AREAS, DRYING, TREATING THE PLATE WITH A LACQUER CONTAINING AN ORGANIC SOLVENT, WHEREBY ONLY THE IMAGE AREAS ARE REMOVED AND THE SAID LACQUER ADHERES TO THE SAID SUPPORT IN THE IMAGE AREAS, AND TREATING THE PLATE WITH WATER WHEREBY THE COATING IS REMOVED ONLY IN THE NON-IMAGE AREAS.
Claim 2
Dependent Claim
99 words
A PROCESS FOR IMPROVING AN ELECTROPHOTOGRAPHIC PRINTING PLATE HAVING, ON A SUPPORT, A FIXED IMAGE FORMED BY DEVELOPING A LATENT ELECTROSTATIC IMAGE WITH AN ELECTROSCOPIC MATERIAL, THE PLATE BEING HYDROPHILIC IN THE IMAGEFREE AREAS, WHICH COMPRISES COATING THE PLATE WITH AN AQUEOUS COLOIDAL AGENT, WHICH COLLOIDAL AGENT ADHERES TO THE NON-IMAGE AREAS, DRYING, TREATING THE PLATE WITH A LACQUER CONTAINING AN ORGANIC SOLVENT, WHEREBY ONLY THE IMAGE AREAS ARE REMOVED AND THE SAID LACQUER ADHERES TO THE SAID SUPPORT IN THE IMAGE AREAS, AND TREATING THE PLATE WITH WATER WHEREBY THE COATING IS REMOVED ONLY IN THE NON-IMAGE AREAS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |