Patent US3772023A successfully refreshed from Google Patents.
US3772023A
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Silver halide photographic element containing an acetylene sulfonyl compound as hardener
Assignee: Konica Minolta Inc
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Filing: 1971-06-21
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Granted: 1973-11-13
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Expires: 1991-06-21
Abstract
Abstract Acetylene sulfonyl compounds of the formula R-C*C-(CH2)n-SO2-R'' wherein R, R'' and n are defined in claims are found to be useful as hardeners for the gelatin films of light-sensitive silver halide photographic materials. Synthesis and use of these compounds also are disclosed.
Inventors
- 👤 T Nakajima
- 👤 S Sugita
- 👤 Y Kishida
- 👤 M Yoshimoto
- 👤 N Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:42
CPC Classifications
C; C07; C07C; C07C317/00; C07C317/14; C07C317/02; C07C317/08; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
The material according to claim 1 wherein R is methyl, R'' is phenyl and n is zero.
Claim 2
Dependent Claim
17 words
The material according to claim 1 wherein R is methyl, R'' is p-tolyl and n is zero.
Claim 3
Dependent Claim
17 words
The material according to claim 1 wherein R is methyl, R'' is phenyl and n is 1.
Claim 4
Dependent Claim
17 words
The material according to claim 1 wherein R is phenyl, R'' is methyl and n is zero.
Claim 5
Dependent Claim
17 words
The material according to claim 1 wherein R is m-methoxyphenyl, R'' is p-tolyl and n is zero.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |