US2698235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements
Assignee: EIDP Inc
•
Filing: 1950-03-16
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Granted: 1954-12-28
•
Expires: 1970-03-16
Abstract
No abstract record available.
Inventors
- 👤 Frank E Swindells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET OF PAPER HAVING ON A LEAST ONE SURFACE A LAYER OF A TRI-COMPONENT COPOLYMER MADE FROM 35 TO 96% OF VINYLIDENE CHLORIDE, 3.5 TO 40% OF ACRYLONITRILE AND 0.5 TO 25% OF ITACONIC ACID MONOMERS, ALL PERCENTAGES BEING BY WEIGHT, AND A WATER-PERMEABLE GELATIN SILVER HALIDE LAYER DEPOSITED ON A SAID LAYER OF COPOLYMER.
Claim 2
Dependent Claim
60 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET OF PAPER HAVING ON A LEAST ONE SURFACE A LAYER OF A TRI-COMPONENT COPOLYMER MADE FROM 35 TO 96% OF VINYLIDENE CHLORIDE, 3.5 TO 40% OF ACRYLONITRILE AND 0.5 TO 25% OF ITACONIC ACID MONOMERS, ALL PERCENTAGES BEING BY WEIGHT, AND A WATER-PERMEABLE GELATIN SILVER HALIDE LAYER DEPOSITED ON A SAID LAYER OF COPOLYMER.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |