US2944902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitization of photographic emulsions with ionic polyalkylene oxide salts
Assignee: Eastman Kodak Co
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Filing: 1956-12-10
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Granted: 1960-07-12
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Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Burt H Carroll
- 👤 John Sagal Jr
- 👤 Dorothy J Beavers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38; G03C1/04; G03C1/043; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A LIGHT-SENSITIVE PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AN AZAINDENE STABILIZING AGENT OF THE CLASS CONSISTING OF HYDROXY AND AMINO TRIAZAINDENES, TETRAZAINDENES AND PENTAZAINDENES, AND A SENSITIZING AGENT OF THE CLASS CONSISTING OF (1) A COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
39 words
A LIGHT-SENSITIVE PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AN AZAINDENE STABILIZING AGENT OF THE CLASS CONSISTING OF HYDROXY AND AMINO TRIAZAINDENES, TETRAZAINDENES AND PENTAZAINDENES, AND A SENSITIZING AGENT OF THE CLASS CONSISTING OF (1) A COMPOUND HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2288226A
Cited
GB556458A
Cited
GB558710A
Cited
US2784090A
Cited
US2716062A
Cited
US2784091A
Cited
US2823123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |