US2756148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsion having clayden effect susceptibility
Assignee: Eastman Kodak Co
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Filing: 1954-06-29
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Granted: 1956-07-24
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Expires: 1974-06-29
Abstract
No abstract record available.
Inventors
- 👤 Edgar A Macwilliam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF MAKING A PHOTOGRAPHIC EMULSION HAVING A HIGH SUSCEPTIBILITY TO CLAYDEN DESENSITIZATION, WHICH COMPRISES ADDING ONE MOLAR PROPORTION OF A SOLUBLE SILVER SALT TO A GELATIN SOLUTION OF MORE THAN ABOUT ONE HALF MOLAR PROPORTION OF A SOLUBLE CHLORIDE AND LESS THAN ABOUT 0.1 MOLE OF A SOLUBLE BROMIDE, WITH STIRRING, DURING LESS THAN TEN BUT MORE THAN TWO MINUTES, AND DURING A PERIOD OF TIME BEGINNING AFTER THE COMMENCEMENT OF SAID ADDITION OF SILVER SALT, ADDING AN ADDITIONAL AMOUNT, LESS THAN ONE-HALF MOLAR PROPORTION BUT MORE THAN 0.1 MOLAR PROPORTION, OF A SOLUBLE BROMIDE TO SAID SOLUTION.
Claim 2
Independent Claim
100 words
THE METHOD OF MAKING A PHOTOGRAPHIC EMULSION HAVING A HIGH SUSCEPTIBILITY TO CLAYDEN DESENSITIZATION, WHICH COMPRISES ADDING ONE MOLAR PROPORTION OF A SOLUBLE SILVER SALT TO A GELATIN SOLUTION OF MORE THAN ABOUT ONE HALF MOLAR PROPORTION OF A SOLUBLE CHLORIDE AND LESS THAN ABOUT 0.1 MOLE OF A SOLUBLE BROMIDE, WITH STIRRING, DURING LESS THAN TEN BUT MORE THAN TWO MINUTES, AND DURING A PERIOD OF TIME BEGINNING AFTER THE COMMENCEMENT OF SAID ADDITION OF SILVER SALT, ADDING AN ADDITIONAL AMOUNT, LESS THAN ONE-HALF MOLAR PROPORTION BUT MORE THAN 0.1 MOLAR PROPORTION, OF A SOLUBLE BROMIDE TO SAID SOLUTION.
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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |