US2597915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of photographic emulsions sensitized with gold compounds
Assignee: Eastman Kodak Co
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Filing: 1949-09-24
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Granted: 1952-05-27
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Expires: 1969-09-24
Abstract
No abstract record available.
Inventors
- 👤 Henry C Yutzy
- 👤 John A Leermakers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR STABILIZING AGAINST LOSS OF SPEED A PHOTOGRAPHIC SILVER HALIDE EMULSION WHICH HAS BEEN SENSITIZED BY DIGESTING THE EMULSION IN THE PRESENCE OF A GOLD COMPOUND, COMPRISING ADDING TO THE GOLD-COMPOUND-SENSITIZED EMULSION AFTER THE FINAL DIGESTION OF THE EMULSION BUT PRIOR TO COATING THE EMULSION ON A SUPPORT, A WATER-INSOLUBLE GOLD COMPOUND WHICH HAS A SOLUBILITY IN WATER NOT GREATER THAN THE EQUIVALENT OF 1.0 MG. OF GOLD PER 100 ML. OF WATER AT 25* C. AND NOT LESS THAN THE EQUIVALENT OF 0.03 MG. OF GOLD PER 100 ML. OF WATER AT 25* C.
Claim 2
Dependent Claim
97 words
A PROCESS FOR STABILIZING AGAINST LOSS OF SPEED A PHOTOGRAPHIC SILVER HALIDE EMULSION WHICH HAS BEEN SENSITIZED BY DIGESTING THE EMULSION IN THE PRESENCE OF A GOLD COMPOUND, COMPRISING ADDING TO THE GOLD-COMPOUND-SENSITIZED EMULSION AFTER THE FINAL DIGESTION OF THE EMULSION BUT PRIOR TO COATING THE EMULSION ON A SUPPORT, A WATER-INSOLUBLE GOLD COMPOUND WHICH HAS A SOLUBILITY IN WATER NOT GREATER THAN THE EQUIVALENT OF 1.0 MG. OF GOLD PER 100 ML. OF WATER AT 25* C. AND NOT LESS THAN THE EQUIVALENT OF 0.03 MG. OF GOLD PER 100 ML. OF WATER AT 25* C.
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) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |