US3869289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel compositions and photographic processes
Assignee: Eastman Kodak Co
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Filing: 1973-02-15
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Granted: 1975-03-04
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Expires: 1993-02-15
Abstract
Abstract Novel adducts are formed from a thioamine and glutaraldehyde. The adducts when incorporated in photographic processing compositions increase the efficiency of development of exposed silver salts.
Inventors
- 👤 Charles F Amering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:23
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
A PHOTOGRAPHIC DEVELOPING COMPOSITION COMPRISING WATER, A SILVER HALIDE DEVELOPING AGENT AND REACTION PRODUCTS OF A THIOAMINE WHICH IS CYSTEINE, CYSTINE, DL-PENICILLAMINE DL-HOMOCYSTEINETHIOLACTONER OR 2-AMINOETHANETHIOL WITH GLUTARALDEHYDE OR WITH GLUTARALDEHYDE BISULFITE IN WHICH SAID REACTION PRODUCTS ARE OBTAINED BY REACTING A MIXTURE HAVING A MOLAR RATIO OF FROM ABOUT 4 TO 1 TO ABOUT 1 TO 60 OF SAID THIOAMINE TO GLUTARALDEHYDE OR GULTARALDEHYDE BISUFITE.
Claim 2
Dependent Claim
65 words
A PHOTOGRAPHIC DEVELOPING COMPOSITION COMPRISING WATER, A SILVER HALIDE DEVELOPING AGENT AND REACTION PRODUCTS OF A THIOAMINE WHICH IS CYSTEINE, CYSTINE, DL-PENICILLAMINE DL-HOMOCYSTEINETHIOLACTONER OR 2-AMINOETHANETHIOL WITH GLUTARALDEHYDE OR WITH GLUTARALDEHYDE BISULFITE IN WHICH SAID REACTION PRODUCTS ARE OBTAINED BY REACTING A MIXTURE HAVING A MOLAR RATIO OF FROM ABOUT 4 TO 1 TO ABOUT 1 TO 60 OF SAID THIOAMINE TO GLUTARALDEHYDE OR GULTARALDEHYDE BISUFITE.
Claim 3
Dependent Claim
18 words
A photographic developing composition of claim 1, in which said composition contains reaction products of cysteine and glutaraldehyde.
Claim 4
Dependent Claim
39 words
A photographic developing composition of claim 1 in which said reaction products are obtained by reacting a mixture having a molar ratio of from about 2 to 1 to about 1 to 8 of the said thioamine to glutaraldehyde.
Claim 5
Dependent Claim
31 words
A photographic developing composition of claim 1 in which said reaction products are obtained by reacting a mixture having a 1 to 1 molar ratio of said thioamine to said glutaraldehyde.
Claim 6
Dependent Claim
56 words
A photographic developing composition comprising water, a silver halide developing agent and reaction products of cysteine, with glutaraldehyde or with glutaraldehyde bisulfite in which said reaction products are obtained by reacting a mixture having a molar ratio of from about 4 to 1 to about 1 to 60 of said cysteine to glutaraldehyde or glutaraldehyde bisulfite.
Claim 7
Dependent Claim
56 words
A photographic developing composition comprising water, a silver halide developing agent and reaction products of cysteine, with glutaraldehyde or with glutaraldehyde bisulfite in which said reaction products are obtained by reacting a mixture having a molar ratio of from about 4 to 1 to about 1 to 60 of said cysteine to glutaraldehyde or glutaraldehyde bisulfite.
Claim 8
Independent Claim
85 words
A method of developing an exposed photographic silver halide element which comprises treating an exposed silver halide layer with a photographic developing solution comprising water, a silver halide developing agent and reaction products of a thioamine which is cysteine, cystine, DL-penicillamine, DL-homocysteinethiolactone or 2-aminoethanethiol with glutaraldehyde or with glutaraldehyde bisulfite in which said reaction products are obtained by reacting a mixture having a molar ratio of from about 4 to 1 to about 1 to 60 of said thioamine to said glutaraldehyde or glutaraldehyde bisulfite.
Claim 9
Independent Claim
85 words
A method of developing an exposed photographic silver halide element which comprises treating an exposed silver halide layer with a photographic developing solution comprising water, a silver halide developing agent and reaction products of a thioamine which is cysteine, cystine, DL-penicillamine, DL-homocysteinethiolactone or 2-aminoethanethiol with glutaraldehyde or with glutaraldehyde bisulfite in which said reaction products are obtained by reacting a mixture having a molar ratio of from about 4 to 1 to about 1 to 60 of said thioamine to said glutaraldehyde or glutaraldehyde bisulfite.
Claim 10
Dependent Claim
15 words
A method of claim 6 in which said reaction products are of cysteine and glutaraldehyde.
Claim 11
Dependent Claim
31 words
A method of claim 6 in which said reaction products are obtained by reacting a mixture having about 4 to 1 to about 1 to 60 of said thioamine to glutaraldehyde.
Claim 12
Dependent Claim
36 words
A method of claim 6 in which said reaction products are obtained by reacting a mixture having a molar ratio of from about 2 to 1 to about 1 to 8 of said thioamine to glutaraldehyde.
Claim 13
Dependent Claim
29 words
A method of claim 6 in which said reaction products are obtained by reacting a misture having a 1 to 1 molar ratio of said thioamine to said glutaraldehyde.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |