US2955038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitized silver halide emulsions
Assignee: EIDP Inc
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Filing: 1957-07-16
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Granted: 1960-10-04
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Expires: 1977-07-16
Abstract
No abstract record available.
Inventors
- 👤 Smith Thomas David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A WATER-PERMEABLE COLLOID SILVER HALIDE EMULSION CONTAINING PER MOLE OF SILVER HALIDE (1) FROM 4.7 TO 30.0 MILLIMOLES 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 5-50 MILLIMOLES OF AT LEAST ONE COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
91 words
A WATER-PERMEABLE COLLOID SILVER HALIDE EMULSION CONTAINING PER MOLE OF SILVER HALIDE (1) FROM 4.7 TO 30.0 MILLIMOLES 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 5-50 MILLIMOLES OF AT LEAST ONE COMPOUND OF THE GENERAL FORMULA
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) | 1963-10-04 | 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 |