Patent US5120630A successfully refreshed from Google Patents.
Patent US2993792A successfully refreshed from Google Patents.
US2993792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic stripping films
Assignee: EIDP Inc
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Filing: 1959-08-06
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Granted: 1961-07-25
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Expires: 1979-08-06
Abstract
No abstract record available.
Inventors
- 👤 Grumbine Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PHOTOGRAPHIC FILM ELEMENT COMPRISING A THIN FLEXIBLE HYDROPHOBIC ELEMENT COMPOSED OF A MACROMOLECULAR ORGANIC POLYMER SOLUBLE IN AN ORGANIC SOLVENT AND BEARING, A SEQUENTIAL DIRECT CONTACT, A GELATIN ANCHOR LAYER NOT MORE THAN .004 MIL IN THICKNESS ETCHED INTO AND ON A SURFACE OF THE MEMBRANE, A CONTIGUOUS UNHARDENED GELATIN LAYER FROM 0.06 TO 0.35 MIL IN THICKNESS ON SAID ANCHOR LAYER AND A LIGHT-SENSITIVE, WATERPERMEABLE ORGANIC COLLOID-SILVER HALIDE EMULSION LAYER ON SAID CONTIGUOUS LAYER, THE GELATIN OF SAID CONTIGUOUS LAYER BEING SOLUBLE IN WATER AT 40* C. TO THE EXTENT OF AT LEAST 10% BY WEIGHT, THE OTHER SURFACE OF SAID FLEXIBLE MEMBRANE BEING LAMINATED TO A SECOND HYDROPHOBIC FLEXIBLE FOLM BASE BY MEANS OF A STRIPPING LAYER.
Claim 2
Dependent Claim
120 words
A PHOTOGRAPHIC FILM ELEMENT COMPRISING A THIN FLEXIBLE HYDROPHOBIC ELEMENT COMPOSED OF A MACROMOLECULAR ORGANIC POLYMER SOLUBLE IN AN ORGANIC SOLVENT AND BEARING, A SEQUENTIAL DIRECT CONTACT, A GELATIN ANCHOR LAYER NOT MORE THAN .004 MIL IN THICKNESS ETCHED INTO AND ON A SURFACE OF THE MEMBRANE, A CONTIGUOUS UNHARDENED GELATIN LAYER FROM 0.06 TO 0.35 MIL IN THICKNESS ON SAID ANCHOR LAYER AND A LIGHT-SENSITIVE, WATERPERMEABLE ORGANIC COLLOID-SILVER HALIDE EMULSION LAYER ON SAID CONTIGUOUS LAYER, THE GELATIN OF SAID CONTIGUOUS LAYER BEING SOLUBLE IN WATER AT 40* C. TO THE EXTENT OF AT LEAST 10% BY WEIGHT, THE OTHER SURFACE OF SAID FLEXIBLE MEMBRANE BEING LAMINATED TO A SECOND HYDROPHOBIC FLEXIBLE FOLM BASE BY MEANS OF A STRIPPING LAYER.
References Cited (Backward Citations)
US2271228A
Cited
US2638417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |