Patent US2776888A successfully refreshed from Google Patents.
US2776888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic sensitizer and developer
Assignee: Individual
•
Filing: 1954-07-15
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Granted: 1957-01-08
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Expires: 1974-07-15
Abstract
No abstract record available.
Inventors
- 👤 Pop Gregorio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:41
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
24 words
A UNIVERSAL DEVELOPING SOLUTION FOR THE PRODUCTION OF BLACK LINE PRINTS CONSISTING OF GM. OXALIC ACID 245 SODIUM CARBONATE 510 PHENOL 518 PHLOROGLUCINOL 15
References Cited (Backward Citations)
US1753059A
Cited
GB324048A
Cited
US1821306A
Cited
US2198827A
Cited
US2657141A
Cited
US2489728A
Cited
US2525751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |