Patent US2739889A successfully refreshed from Google Patents.
US2739889A
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US
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Process for fixing lithographic diazotype printing foils having been exposed to light
Assignee: Azoplate Corp
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Filing: 1951-12-03
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Granted: 1956-03-27
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Expires: 1971-12-03
Abstract
No abstract record available.
Inventors
- 👤 Neugebauer Wilhelm
- 👤 Barthenheier Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:19
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/40; G03F7/20; G03F7/2022; G03F7/2024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
IN A PROCESS FOR MAKING A LITHOGRAPHIC PRINTING MATERIAL FROM PHOTOSENSITIVE MATERIAL SENSITIZED WITH A LIGH-SENSITIVE DIAZO COMPOUND SELECTED FROM THE GROUP CONSISTING OF: (1) THE DIAZO COMPOUNDS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
32 words
IN A PROCESS FOR MAKING A LITHOGRAPHIC PRINTING MATERIAL FROM PHOTOSENSITIVE MATERIAL SENSITIZED WITH A LIGH-SENSITIVE DIAZO COMPOUND SELECTED FROM THE GROUP CONSISTING OF: (1) THE DIAZO COMPOUNDS CORRESPONDING TO THE FORMULA
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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |