US3625691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coloring non-diffusibly photographic layers by means of an amino-guanidized dialdehyde starch mordant
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1969-05-20
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Granted: 1971-12-07
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Expires: 1989-05-20
Abstract
Abstract A PHOTOGRAPHIC LAYER CAN BE MADE COMPLETEDLY NONDIFFUSIBLY COLORED BY INCORPORATING INTO A BINDER OF THE PHOTOGRAPHIC LAYER, A MORDANT WHICH IS A REACTION PRODUCT OF AMINOGUANIDINE WITH DIALDEHYDE STARCH, AND COLORING THE PHOTOGRAPHIC LAYER WITH AN ANIONIC DYE.
Inventors
- 👤 Yasushi Ohyama
- 👤 Sadayuki Miyazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:33
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; G03C8/56; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C7/00; G03C7/22; G03C7/25; G03C7/28; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |