US2784087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic light sensitive elements containing ultra-violet filters
Assignee: Eastman Kodak Co
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Filing: 1954-09-20
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Granted: 1957-03-05
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Expires: 1974-09-20
Abstract
No abstract record available.
Inventors
- 👤 George W Sawdey
- 👤 James A Van Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:50
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT, AT LEAST ONE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER, AND INCORPORATED IN ONE OF THE LAYERS OF SAID PHOTOGRAPHIC ELEMENT A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
36 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT, AT LEAST ONE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER, AND INCORPORATED IN ONE OF THE LAYERS OF SAID PHOTOGRAPHIC ELEMENT A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL 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) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |