Patent US2968557A successfully refreshed from Google Patents.
US2968557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic filter layer
Assignee: Agfa Gevaert NV
•
Filing: 1956-11-23
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Granted: 1961-01-17
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Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Burgardt Lothar
- 👤 Wahl Ottmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:45
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/04; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PHOTOGRAPHIC LIGHT SENSITIVE MATERIAL COMPRISING IN COMBINATION A SUPPORT, A LIGHT SENSITIVE SILVER HALIDE EMULSION LAYER ON SAID SUPPORT, SAID SUPPORT ALSO CARRYING A LIGHT ABSORBING LAYER OF AN INDOLE DYESTUFF HAVING THE FORMULA:
Claim 2
Dependent Claim
35 words
A PHOTOGRAPHIC LIGHT SENSITIVE MATERIAL COMPRISING IN COMBINATION A SUPPORT, A LIGHT SENSITIVE SILVER HALIDE EMULSION LAYER ON SAID SUPPORT, SAID SUPPORT ALSO CARRYING A LIGHT ABSORBING LAYER OF AN INDOLE DYESTUFF HAVING THE FORMULA:
References Cited (Backward Citations)
US2298731A
Cited
US2622980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |