US4057538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for hardening gelatin
Assignee: Konica Minolta Inc
•
Filing: 1975-02-12
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Granted: 1977-11-08
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Expires: 1995-02-12
Abstract
Abstract This invention relates to a method of hardening gelatin which is accomplished by combining a compound containing at least one carbo-di-imide group with a compound having at least two vinyl sulfonyl groups. This combination has application to the photographic industry by providing a method of hardening the type of gelatin which is used in a gelatin -- containing photographic layer of a light-sensitive halide photographic material.
Inventors
- 👤 Teiji Habu
- 👤 Tsuneo Wada
- 👤 Takashi Sasaki
- 👤 Shigemasa Itoh
- 👤 Takayoshi Ohmura
- 👤 Hiroki Ishii
- 👤 Hisashi Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
A method for hardening gelatin, which comprises treating said gelatin with a combination of a compound selected from the group consisting of: ##STR3##
Claim 2
Independent Claim
23 words
A method for hardening gelatin, which comprises treating said gelatin with a combination of a compound selected from the group consisting of: ##STR3##
Claim 3
Dependent Claim
26 words
A method as claimed in claim 1, wherein said gelatin is that which exists in a gelatin-containing photographic layer of a light-sensitive silver halide photographic material.
Claim 4
Dependent Claim
35 words
A method as claimed in claim 1 wherein said compound is incorporated into a processing liquid which is to be brought into contact with a gelatin-containing layer of an exposed light-sensitive silver halide photographic material.
Claim 5
Dependent Claim
31 words
A method as claimed in claim 1, wherein said gelatin is that which exists in a gelatin-containing liquid capable of forming a photographic layer of a light-sensitive silver halide photographic material.
Claim 6
Dependent Claim
46 words
A method as claimed in claim 1, wherein said hardener combination is used in the amount of from 0.01 to 100% by weight, based on the dry weight of the gelatin, either one component of said combination comprising at least 10% by weight of said combination.
Claim 7
Dependent Claim
11 words
Modified gelatin which is obtained by the method of claim 1.
References Cited (Backward Citations)
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US3100704A
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US2938892A
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US3392024A
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US3455893A
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US3676143A
Cited
US3868257A
Cited
US3841872A
Cited
US3832181A
Cited
US3850639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |