Patent US2937087A successfully refreshed from Google Patents.
US2937087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions
Assignee: EIDP Inc
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Filing: 1957-09-30
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Granted: 1960-05-17
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Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Forsgard Frederick Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PHOTOGRAPHIC SILVER HALIDE DISPERSION IN A GELATIN BINDING AGENT, SAID DISPERSION CONTAINING IN A AMOUNT FROM ABOUT 0.05 TO ABOUT 1.1 GRAMS PER MOLE OF SILVER HALIDE AT LEAST ONE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
35 words
A PHOTOGRAPHIC SILVER HALIDE DISPERSION IN A GELATIN BINDING AGENT, SAID DISPERSION CONTAINING IN A AMOUNT FROM ABOUT 0.05 TO ABOUT 1.1 GRAMS PER MOLE OF SILVER HALIDE AT LEAST ONE COMPOUND OF THE 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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |