US3582339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element
Assignee: Eastman Kodak Co
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Filing: 1968-10-30
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Granted: 1971-06-01
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Expires: 1988-10-30
Abstract
Abstract THE ADHESION OF PHOTOGRAPHIC LAYERS TO CORONA ACTIVATED POLYOLEFIN SURFACES IS IMPROVED BY COATING A GELATIN SUBBING LAYER CONTAINING CERTAIN GELATIN HARDENING AGENTS ONTO THE CORONA ACTIVATED SURFACES. THE FOGGING OF SILVER HALIDE EMULSION LAYERS COATED ON THE CORONA ACTIVATED SURFACES IS ALSO AVOIDED. THE HARDENING AGENTS INCLUDE EITHER (1) A WATER-DISPERSIBLE POLYMERIC REACTION PRODUCT OF EPICHLOROHYDRIN WITH A POLYAMIDE DERIVED FROM A POLYALKYLENE POLYAMINE AND A DICARBOXYLIC ACID OR (2) A BIS-VINYLSULFONYL ALKYL ETHER.
Inventors
- 👤 Richard H Martens
- 👤 Francis M Hartman
- 👤 William J Venor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:16
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C1/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |