US3072483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element comprising polyethylene terephthalate film base
Assignee: Eastman Kodak Co
•
Filing: 1958-12-22
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Granted: 1963-01-08
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Donald J Trevoy
- 👤 Richard A Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C1/795; G03C1/7954; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PHOTOGRAPHIC ELEMENT COMPRISING: (A) A POLYETHYLENE TEREPHTHALATE FILM BASE A SURFACE OF WHICH HAS BEEN SUBJECTED TO AN OXIDIZING FLAME HAVING A TEMPERATURE OF 1600-3800*F. FOR A FRACTION OF A SECOND, WHILE MAINTAINING THE REVERSE SURFACE AT A TEMPERATURE OF 45-80*F., UNTIL THE CONTACT ANGLE OF THE SURFACE MEASURED WITH WATER HAS BEEN REDUCED TO APPROXIMATELY 5*, (B) A METHYL ACRYLATE-VINYLIDENE CHLORIDE-ITACONIC ACID COPOLYMER SUBSTRATE COATED ON SAID FLAME TREATED SURFACE, AND (C) A GELATINO-SILVER HALIDE EMULSION LAYER COATED ON THE SUBBING LAYER.
Claim 2
Dependent Claim
84 words
A PHOTOGRAPHIC ELEMENT COMPRISING: (A) A POLYETHYLENE TEREPHTHALATE FILM BASE A SURFACE OF WHICH HAS BEEN SUBJECTED TO AN OXIDIZING FLAME HAVING A TEMPERATURE OF 1600-3800*F. FOR A FRACTION OF A SECOND, WHILE MAINTAINING THE REVERSE SURFACE AT A TEMPERATURE OF 45-80*F., UNTIL THE CONTACT ANGLE OF THE SURFACE MEASURED WITH WATER HAS BEEN REDUCED TO APPROXIMATELY 5*, (B) A METHYL ACRYLATE-VINYLIDENE CHLORIDE-ITACONIC ACID COPOLYMER SUBSTRATE COATED ON SAID FLAME TREATED SURFACE, AND (C) A GELATINO-SILVER HALIDE EMULSION LAYER COATED ON THE SUBBING LAYER.
References Cited (Backward Citations)
US2632921A
Cited
US2648097A
Cited
US2647836A
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US2767103A
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GB788365A
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FR1159702A
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US2943937A
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US2876187A
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US2893896A
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |