Patent US2768077A successfully refreshed from Google Patents.
US2768077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photolithographic material and process
Assignee: Azoplate Corp
•
Filing: 1951-05-12
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Granted: 1956-10-23
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Expires: 1971-05-12
Abstract
No abstract record available.
Inventors
- 👤 Neugebauer Wilhelm
- 👤 Scherer Theo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:46
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/0045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
THE PROCESS FOR THE PREPARATION OF PRINTING PLATES WHICH COMPRISES COATING A BASE MATERIAL WITH AN UNSATURATED KETONE SELECTED FROM THE GROUP CONSISTING OF WATER INSOLUBLE KETONES HAVING THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
31 words
THE PROCESS FOR THE PREPARATION OF PRINTING PLATES WHICH COMPRISES COATING A BASE MATERIAL WITH AN UNSATURATED KETONE SELECTED FROM THE GROUP CONSISTING OF WATER INSOLUBLE KETONES HAVING THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
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US2003268A
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US2184283A
Cited
US2312854A
Cited
US2373357A
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US2367420A
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US2532865A
Cited
US2556144A
Cited
US2570262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |