Patent US2642361A successfully refreshed from Google Patents.
US2642361A
Expired / Lapsed
US
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Photographic silver halide emulsions sensitized with water-insoluble gold compounds
Assignee: Eastman Kodak Co
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Filing: 1949-07-20
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Granted: 1953-06-16
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Expires: 1969-07-20
Abstract
No abstract record available.
Inventors
- 👤 Rudolph E Damschroder
- 👤 Henry C Yutzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR SENSITIZING A PHOTOGRAPHIC SILVER HALIDE EMULSION COMPRISING ADDING TO THE EMULSION, BEFORE OR DURING FINAL DIGESTION, A WATER-INSOLUBLE GOLD COMPOUND WHICH HAS A SOLUBILITY IN WATER EQUIVALENT TO FROM 0.03 MG. TO 1.0 MG. OF GOLD PER 100 ML. OF WATER AT 25* C., AND DIGESTING THE EMULSION IN THE PRESENCE OF THE WATER-INSOLUBLE GOLD COMPOUND.
Claim 2
Dependent Claim
59 words
A PROCESS FOR SENSITIZING A PHOTOGRAPHIC SILVER HALIDE EMULSION COMPRISING ADDING TO THE EMULSION, BEFORE OR DURING FINAL DIGESTION, A WATER-INSOLUBLE GOLD COMPOUND WHICH HAS A SOLUBILITY IN WATER EQUIVALENT TO FROM 0.03 MG. TO 1.0 MG. OF GOLD PER 100 ML. OF WATER AT 25* C., AND DIGESTING THE EMULSION IN THE PRESENCE OF THE WATER-INSOLUBLE GOLD COMPOUND.
References Cited (Backward Citations)
US2399083A
Cited
GB608667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |