US2865792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduced curl in photographic paper
Assignee: Eastman Kodak Co
•
Filing: 1954-12-20
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Granted: 1958-12-23
•
Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Glen G Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/06; G03C1/81; Y; Y10; Y10S; Y10S430/00; Y10S430/131
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS OF TREATING PHOTOGRAPHIC PAPER TO REDUCE CURL, PRIOR TO COATING WITH A PHOTOGRAPHIC EMULSION COMPRISING IMPREGNATING THE PAPER WITH A LONG-CHAIN, NONHYGROSCOPIC ORGANIC ETHER HAVING A CHEMICAL COMPOSITION RO(CH2CH2O)NR'' IN WHICH R AND R'' ARE ALKYL GROUPS AND N IS A NUMBER BETWEEN 2 AND 135, FOLLOWED BY COATING THE IMPREGNATED PAPER WITH A LIGHT-SENSITIVE PHOTOGRAPHIC EMULSION.
Claim 2
Dependent Claim
59 words
A PROCESS OF TREATING PHOTOGRAPHIC PAPER TO REDUCE CURL, PRIOR TO COATING WITH A PHOTOGRAPHIC EMULSION COMPRISING IMPREGNATING THE PAPER WITH A LONG-CHAIN, NONHYGROSCOPIC ORGANIC ETHER HAVING A CHEMICAL COMPOSITION RO(CH2CH2O)NR'' IN WHICH R AND R'' ARE ALKYL GROUPS AND N IS A NUMBER BETWEEN 2 AND 135, FOLLOWED BY COATING THE IMPREGNATED PAPER WITH A LIGHT-SENSITIVE PHOTOGRAPHIC EMULSION.
References Cited (Backward Citations)
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US2108810A
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US2249118A
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US2286314A
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US2419206A
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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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |