US2763566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzal-alpha-methyl-alpha-phenylhydrazones and derivatives as ultraviolet absorbers
Assignee: Eastman Kodak Co
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Filing: 1954-02-19
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Granted: 1956-09-18
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Expires: 1974-02-19
Abstract
No abstract record available.
Inventors
- 👤 James A Van Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:51
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/72; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/30; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; Y; Y10; Y10T; Y10T428/00; Y10T428/17
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
A PROCESS FOR PROTECTING A PHOTOGRAPHIC PRINT FROM ULTRAVIOLET DETERIORATION COMPRISING DEPOSITING A BENAL DERIVATIVE OF A-METHYL-A-PHENYLHYDRAZONE IN A SUITABLE CARRIER UPON A SURFACE OF THE PRINT.
References Cited (Backward Citations)
US2129132A
Cited
US2241239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |