US3746547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a photographic light sensitive element
Assignee: Fujifilm Holdings Corp
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Filing: 1971-11-09
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Granted: 1973-07-17
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Expires: 1991-11-09
Abstract
Abstract PHOTOGRAPHIC ELEMENTS WITH INCREASED VICOSITY OF GELATIN LAYERS CONTAINING AN ACID DYE AND A MORDANT FOR THE DYE ARE OBTAINED BY INCORPORATING IN THE GELATIN LAYER A COPOLYMER OF 30 TO 70 MOLE PERCENT -CH2-C(-R)(-CO-NH2)- R=H OR CH3, AND -CH2-C(-R)(-COO-M)- R=H OR CH3 M=H, NH4, LI, NA OR K. THE COPOLYMER HAS A DEGREE OF POLYMERIZATION OF 1,500 TO 50,000. A PROCESS FOR INCREASING THE VICOSITY OF GELATIN/ACID DYE/MORDANT LAYER COMPRISING ADDING SUCH A COPOLYMER THERETO. AN IMPROVED COATING PROCESS USING A COPOLYMER.
Inventors
- 👤 N Tsuji
- 👤 T Miyazako
- 👤 H Ueda
- 👤 Y Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:02
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |