US3772002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic couplers
Assignee: 3M Co
•
Filing: 1971-10-14
•
Granted: 1973-11-13
•
Expires: 1991-10-14
Abstract
Abstract Phenolic color couplers which have alkyl groups bonded to at least one aromatic ring thereof, the number of carbon atoms in said alkyl groups totaling at least 12, and the phenolic nucleus of said coupler bearing an alkyl substituent in the meta position having at least two carbon atoms. The couplers exhibit unusual stability to light, heat, and moisture, and are preferably incorporated in silver halide emulsions by the solvent dispersion technique.
Inventors
- 👤 P Ramello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:47
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/346; C; C07; C07C; C07C205/00; C07C205/13; C07C205/26; C07C205/45; C07C273/00; C07C273/18; C07C273/1809; C07C273/1818; C07C273/1827; C07C37/00; C07C37/01; C07C37/045; C07C37/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
11 words
The emulsion of claim 1 wherein said coupler is 2-(2'',4''-di-tert-amyl-6''-chloro-phenoxy-acetamido)-4,6-di-chloro-5 -ethylphenol.
Claim 2
Dependent Claim
11 words
The emulsion of claim 1 wherein said coupler is 2(2'',4''-di t-amyl-fenoxyacetamido)-4-chloro-5-propyl-phenol.
Claim 3
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-benzoylamideo-4-chloro-5-pentadecylphenol.
Claim 4
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-(phenoxyacetamido)-4-chloro-5-pentadecylphenol.
Claim 5
Dependent Claim
12 words
The emulsion of claim 1 wherein said coupler is 2- Alpha -phenoxy-butyroylamido-4-chloro-5-pentadecylphenol.
Claim 6
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-phenylureido-4-chloro-5-pentadecylphenol.
Claim 7
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-hexahydrobenzoylamido-4-chloro-5-pentadecylphenol.
Claim 8
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-hexahydrobenzoylamido-4,6-dichloro-5-pentadecylphenol.
Claim 9
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-phenylacetylamido-4,6-dichloro-5-pentadecylphenol.
Claim 10
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-hexahydrobenzoyl-3-tentadecyl-4,6-dichlorophenol.
Claim 11
Dependent Claim
10 words
The emulsion of claim 1 wherein said coupler is 2-phenyl-acetamido-3-pentadecyl-4,6-dichlorophenol.
References Cited (Backward Citations)
US2908573A
Cited
US2920961A
Cited
US3658537A
Cited
US3620745A
Cited
US3652286A
Cited
US3700454A
Cited
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 |