US2908667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic process using light-sensitive polymeric quaternary salts
Assignee: Eastman Kodak Co
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Filing: 1955-10-06
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Granted: 1959-10-13
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Expires: 1975-10-06
Abstract
No abstract record available.
Inventors
- 👤 Jack L R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:37
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; C; C08; C08F; C08F8/00; C08F8/02; C08F8/30; C08F8/44; C08F2810/00; C08F2810/30; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A LAYER OF A LIGHT-SENSITIVE POLYMERIC REACTION PRODUCT OF (A) AN AROMATIC ALDEHYDE OF THE BENZENE SERIES WITH (B) THE REACTION PRODUCT OF A METHYL PYRIDINE WITH A BENZENE SULFONIC ACID ESTER OF POLYVINYL ALCOHOL.
Claim 2
Dependent Claim
44 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A LAYER OF A LIGHT-SENSITIVE POLYMERIC REACTION PRODUCT OF (A) AN AROMATIC ALDEHYDE OF THE BENZENE SERIES WITH (B) THE REACTION PRODUCT OF A METHYL PYRIDINE WITH A BENZENE SULFONIC ACID ESTER OF POLYVINYL ALCOHOL.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |