US2955037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions
Assignee: EIDP Inc
•
Filing: 1957-05-01
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Granted: 1960-10-04
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Expires: 1977-05-01
Abstract
No abstract record available.
Inventors
- 👤 Smith Thomas David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:03
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PHOTOGRAPHIC, WATER-PERMEABLE COLLOID-SILVER HALIDE EMULSION CONTAINING PER MOLE OF SILVER HALIDE (1) FROM 0.1 TO 2.0 GRAMS OF A NON-OPTICAL SENSITIZING AGENT HAVING A MOLECULAR WEIGHT OF AT LEAST 282 AND CONTAINING AT LEAST 2 OXYALKYLENE UNITS OF 2 TO 4 CARBON ATOMS AND BEING TAKEN FROM THE GROUP CONSISTING OF POLYALKYLENE ETHER GLYCOLS, AND CONDENSATION PRODUCTS OF ALKYLENE OXDIES OF 2 TO 4 CARBON ATOMS WITH MONOHYDRIC ALCOHOLS, GLYCOLS, FATTY ACIDS, SATURATED ALIPHATIC AMINES, AND HEXITOL RING DEHYDRATION PRODUCTS, AND (2) FROM 5 TO 50 MILLIMOLES OF AT LEAST ONE HYDROCARBON-SUBSTITUTED MONOHYDRIC PHENOL OF AT LEAST 9 CARBON ATOMS HAVING A HYDROCARBON SUBSTITUENT IN THE PARA-POSITION TO THE HYDROXYL GROUP AND 0 TO 4 ADDITIONAL HYDROCARBON SUBSTITUENTS IN THE REMAINDER OF THE BENZENE RING, SAID HYDROCARBON SUBSTITUENTS BEING THE SOLE SUBSTITUENTS IN SAID PHENOL AND BEING TAKEN FROM THE GROUP CONSISTING OF ALKYL, ARYL, ARALKYL AND CYCLOALKYL SUBSTITUENTS.
Claim 2
Dependent Claim
150 words
A PHOTOGRAPHIC, WATER-PERMEABLE COLLOID-SILVER HALIDE EMULSION CONTAINING PER MOLE OF SILVER HALIDE (1) FROM 0.1 TO 2.0 GRAMS OF A NON-OPTICAL SENSITIZING AGENT HAVING A MOLECULAR WEIGHT OF AT LEAST 282 AND CONTAINING AT LEAST 2 OXYALKYLENE UNITS OF 2 TO 4 CARBON ATOMS AND BEING TAKEN FROM THE GROUP CONSISTING OF POLYALKYLENE ETHER GLYCOLS, AND CONDENSATION PRODUCTS OF ALKYLENE OXDIES OF 2 TO 4 CARBON ATOMS WITH MONOHYDRIC ALCOHOLS, GLYCOLS, FATTY ACIDS, SATURATED ALIPHATIC AMINES, AND HEXITOL RING DEHYDRATION PRODUCTS, AND (2) FROM 5 TO 50 MILLIMOLES OF AT LEAST ONE HYDROCARBON-SUBSTITUTED MONOHYDRIC PHENOL OF AT LEAST 9 CARBON ATOMS HAVING A HYDROCARBON SUBSTITUENT IN THE PARA-POSITION TO THE HYDROXYL GROUP AND 0 TO 4 ADDITIONAL HYDROCARBON SUBSTITUENTS IN THE REMAINDER OF THE BENZENE RING, SAID HYDROCARBON SUBSTITUENTS BEING THE SOLE SUBSTITUENTS IN SAID PHENOL AND BEING TAKEN FROM THE GROUP CONSISTING OF ALKYL, ARYL, ARALKYL AND CYCLOALKYL SUBSTITUENTS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |