US2930694A
Expired / Lapsed
US
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Optical sensitization of direct positive emulsions
Assignee: Agfa Gevaert NV
•
Filing: 1957-03-12
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Granted: 1960-03-29
•
Expires: 1977-03-12
Abstract
No abstract record available.
Inventors
- 👤 Coenen Max
- 👤 Gotze Johannes
- 👤 Grisar Ulrich
- 👤 Riester Oskar
- 👤 Stracke Werner
- 👤 Zietan Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:05
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; G03C1/48538; G03C1/48584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PHOTOGRAPHIC MATERIAL COMPRISING A DIRECT POSITIVE SILVER HALIDE EMULSION LAYER CONTAINING AT LEAST ONE OPTICAL SENSITIZER OF THE GENERAL FROMULA:
Claim 2
Dependent Claim
21 words
A PHOTOGRAPHIC MATERIAL COMPRISING A DIRECT POSITIVE SILVER HALIDE EMULSION LAYER CONTAINING AT LEAST ONE OPTICAL SENSITIZER OF THE GENERAL FROMULA:
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |