US2589004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing couplers from bi-functional amines
Assignee: Eastman Kodak Co
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Filing: 1948-11-04
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Granted: 1952-03-11
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Expires: 1968-11-04
Abstract
No abstract record available.
Inventors
- 👤 Weissberger Arnold
- 👤 Jr Charles O Edens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:26
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD FOR PREPARING A PHOTOGRAPHIC COUPLER COMPOUND FROM A PRIMARY AMINOPHENYLALKYLAMINE WHICH COMPRISES FIRST ACYLATING ONLY THE AMINE GROUP DIRECTLY ATTACHED TO THE ALKYL RADICAL OF SAID AMINE, WITH A PHENYL ESTER OF A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF 1-HYDROXY-2-NAPHTHOIC ACID, PHENYL-2-(2'',4''-DIAMYLPHENOXY)-5-NITRO BENZOIC ACID, 1PHENYL-3-CARBOXY-5-PYRAZOLONE, 2,4-DIAMYLPHENOXY ACETIC ACID, BENZOYL ACETIC ACID, P-BONZOYLACETAMIDO BENZOIC ACID, ACETIC ACID, METHANE SULFONIC ACID AND P-TOLUENE SULFONIC ACID, AT A TEMPERATURE AT WHICH SUBSTANTIALLY ONLY SAID AMINE GROUP IS ACYLATED, THEN ACYLATING THE AMINE GROUP ATTACHED TO THE PHENYL RADICAL OF THE RESULTING AMIDE WITH AN ACYLATING AGENT, ONE OF SAID PHENYL ESTER AND ACYLATING AGENT CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF PHENOLIC HYDROXYL AND METHYLENE GROUPS CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO PHOTOGRAPHIC DEVELOPING AGENT TO FORM A DYE.
Claim 2
Independent Claim
138 words
A METHOD FOR PREPARING A PHOTOGRAPHIC COUPLER COMPOUND FROM A PRIMARY AMINOPHENYLALKYLAMINE WHICH COMPRISES FIRST ACYLATING ONLY THE AMINE GROUP DIRECTLY ATTACHED TO THE ALKYL RADICAL OF SAID AMINE, WITH A PHENYL ESTER OF A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF 1-HYDROXY-2-NAPHTHOIC ACID, PHENYL-2-(2'',4''-DIAMYLPHENOXY)-5-NITRO BENZOIC ACID, 1PHENYL-3-CARBOXY-5-PYRAZOLONE, 2,4-DIAMYLPHENOXY ACETIC ACID, BENZOYL ACETIC ACID, P-BONZOYLACETAMIDO BENZOIC ACID, ACETIC ACID, METHANE SULFONIC ACID AND P-TOLUENE SULFONIC ACID, AT A TEMPERATURE AT WHICH SUBSTANTIALLY ONLY SAID AMINE GROUP IS ACYLATED, THEN ACYLATING THE AMINE GROUP ATTACHED TO THE PHENYL RADICAL OF THE RESULTING AMIDE WITH AN ACYLATING AGENT, ONE OF SAID PHENYL ESTER AND ACYLATING AGENT CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF PHENOLIC HYDROXYL AND METHYLENE GROUPS CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO PHOTOGRAPHIC DEVELOPING AGENT TO FORM A DYE.
References Cited (Backward Citations)
US2312986A
Cited
US2498466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |