US2784091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-hydroxy-6-alkyl-1, 3, 3alpha, 7-tetrazaindene stabilizers for photographic emulsions sensitized with polyalkylene esters, amides, and ethers
Assignee: Eastman Kodak Co
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Filing: 1954-04-29
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Granted: 1957-03-05
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Burt H Carroll
- 👤 Norman F Beach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A LIGHT-SENSITIVE SILVER HALIDE EMULSION SENSITIZED WITH A CONDENSATION PRODUCT OF 6 TO 50 MOLES OF AN ALKYLENE OXIDE WITH 1 MOLE OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LAURIC ACID, ALURYL AMIDE, GLYCINE AND PHENOL, SAID ALKYLENE OXIDE CONTAINING FROM 2 TO 4 CARBON ATOMS AND SAID CONDENSATION PRODUCT HAVING A MOLECULAR WEIGHT OF AT LEAST 300.
Claim 2
Dependent Claim
60 words
A LIGHT-SENSITIVE SILVER HALIDE EMULSION SENSITIZED WITH A CONDENSATION PRODUCT OF 6 TO 50 MOLES OF AN ALKYLENE OXIDE WITH 1 MOLE OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LAURIC ACID, ALURYL AMIDE, GLYCINE AND PHENOL, SAID ALKYLENE OXIDE CONTAINING FROM 2 TO 4 CARBON ATOMS AND SAID CONDENSATION PRODUCT HAVING A MOLECULAR WEIGHT OF AT LEAST 300.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |