US2701197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonpolymeric sulfonated hydroquinone antistain agents
Assignee: Eastman Kodak Co
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Filing: 1951-12-15
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Granted: 1955-02-01
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Expires: 1971-12-15
Abstract
No abstract record available.
Inventors
- 👤 John R Thirtle
- 👤 Frederick C Duennebier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:31
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39212; G03C7/39216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A COLOR-FORMING PHOTOGRAPHIC ELEMENT HAVING AN EMULSION OF REDUCED COLOR FOGGING TENDENCY, COMPRISING A SUPPORT HAVING THEREON AT LEAST A SILVER HALIDE EMULSION LAYER CONTAINING A NON-DIFFUSING COUPLER COMPOUND, AT LEAST ONE LAYER OF SAID ELEMENT CONTAINING A NON-DIFFUSING ANTISTAIN AGENT OF THE FOLLOWING STRUCTURE:
Claim 2
Dependent Claim
45 words
A COLOR-FORMING PHOTOGRAPHIC ELEMENT HAVING AN EMULSION OF REDUCED COLOR FOGGING TENDENCY, COMPRISING A SUPPORT HAVING THEREON AT LEAST A SILVER HALIDE EMULSION LAYER CONTAINING A NON-DIFFUSING COUPLER COMPOUND, AT LEAST ONE LAYER OF SAID ELEMENT CONTAINING A NON-DIFFUSING ANTISTAIN AGENT OF THE FOLLOWING STRUCTURE:
References Cited (Backward Citations)
US2186849A
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US2270756A
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US2360290A
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US2367549A
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US2410689A
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FR952441A
Cited
US2450747A
Cited
US2418613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |