Patent US2965487A successfully refreshed from Google Patents.
US2965487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide emulsions
Assignee: EIDP Inc
•
Filing: 1959-12-14
•
Granted: 1960-12-20
•
Expires: 1979-12-14
Abstract
No abstract record available.
Inventors
- 👤 Smith Thomas David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A 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 ONE POLYOXYALKYLENE GROUP HAVING AT LEAST TWO OXYALKYLENE RADICALS OF 2 TO 4 CARBON ATOMS TAKEN FROM THE GROUP CONSISTING OF CONDENSATION PRODUCTS OF ALKYLENE OXIDES OF 2-4 CARBON ATOMS WITH GLYCOLS, FATTY ACIDS, SATURATED ALIPHATIC AMINES AND HEXITOL RING DEHYDRATION PRODUCTS AND (2) FROM 5 TO 50 MILLIMOLES OF A HYDROCARBON-SUBSTITUTED MONONUCLEAR MONOHYDRIC PHENOL OF AT LEAST 9 CARBON ATOMS WHEREIN THE HYDROCARBON SUBSTITUENT CONTAINS 3 TO 12 CARBON ATOMS AND IS IN ONE OF THE POSITIONS ORTHO- AND META- TO THE HYDROXYL GROUP AND THE OTHER POSITIONS OF THE BENZENE RING ARE UNSUBSTITUTED.
Claim 2
Dependent Claim
130 words
A 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 ONE POLYOXYALKYLENE GROUP HAVING AT LEAST TWO OXYALKYLENE RADICALS OF 2 TO 4 CARBON ATOMS TAKEN FROM THE GROUP CONSISTING OF CONDENSATION PRODUCTS OF ALKYLENE OXIDES OF 2-4 CARBON ATOMS WITH GLYCOLS, FATTY ACIDS, SATURATED ALIPHATIC AMINES AND HEXITOL RING DEHYDRATION PRODUCTS AND (2) FROM 5 TO 50 MILLIMOLES OF A HYDROCARBON-SUBSTITUTED MONONUCLEAR MONOHYDRIC PHENOL OF AT LEAST 9 CARBON ATOMS WHEREIN THE HYDROCARBON SUBSTITUENT CONTAINS 3 TO 12 CARBON ATOMS AND IS IN ONE OF THE POSITIONS ORTHO- AND META- TO THE HYDROXYL GROUP AND THE OTHER POSITIONS OF THE BENZENE RING ARE UNSUBSTITUTED.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |