US2699994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic treating solutions containing ferricyanide ions and alpha ether carboxylic acid compounds
Assignee: EIDP Inc
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Filing: 1953-04-15
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Granted: 1955-01-18
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Expires: 1973-04-15
Abstract
No abstract record available.
Inventors
- 👤 Umberger Jacob Quentin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; G03C5/26; G03C5/40; G03C5/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A COMPOSITION COMPRISING AN AQUEOUS SOLUTION CONTAINING FERRICYANIDE IONS, CATIONS THAT FORM RELATIVELY INSOLUBLE FERROCYANIDE COMPOUNDS AND AN ALPHA ETHER OF A CARBOXYLIC ACID COMPOUND CONTAINING AT LEAST ONE RADICAL OF THE FORMULA -O-CH2COOM, WHEREIN M IS A MEMBER TAKEN FROM THE GROUP CONSISTING OF HYDROGEN AND WATER-SOLUBLE SALT-FORMING CATIONS, TAKEN FROM THE GROUP CONSISTING OF DIGLYCOLIC ACID, METHOXYAVETIC ACID, O-METHOXYPHENOXYACETIC ACID, P-NITROPHENOXYACETIC ACID, 2,7NAPHTHOXYDIACETIC ACID, ETHYLENE BISGLYCOLIC ACID, STARCH GLYCOLIC ACID AND CELLULOSE GLYCOLIC ACID AND THEIR WATERSOLUBLE SALTS.
Claim 2
Dependent Claim
80 words
A COMPOSITION COMPRISING AN AQUEOUS SOLUTION CONTAINING FERRICYANIDE IONS, CATIONS THAT FORM RELATIVELY INSOLUBLE FERROCYANIDE COMPOUNDS AND AN ALPHA ETHER OF A CARBOXYLIC ACID COMPOUND CONTAINING AT LEAST ONE RADICAL OF THE FORMULA -O-CH2COOM, WHEREIN M IS A MEMBER TAKEN FROM THE GROUP CONSISTING OF HYDROGEN AND WATER-SOLUBLE SALT-FORMING CATIONS, TAKEN FROM THE GROUP CONSISTING OF DIGLYCOLIC ACID, METHOXYAVETIC ACID, O-METHOXYPHENOXYACETIC ACID, P-NITROPHENOXYACETIC ACID, 2,7NAPHTHOXYDIACETIC ACID, ETHYLENE BISGLYCOLIC ACID, STARCH GLYCOLIC ACID AND CELLULOSE GLYCOLIC ACID AND THEIR WATERSOLUBLE SALTS.
References Cited (Backward Citations)
US2625475A
Cited
US2625476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |