US2566259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
8-alkyl sulfonamidoethyl-n-substituted saturated heterocyclic developers
Assignee: Eastman Kodak Co
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Filing: 1948-09-25
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Granted: 1951-08-28
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Expires: 1968-09-25
Abstract
No abstract record available.
Inventors
- 👤 John R Thirtle
- 👤 Weissberger Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:23
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/4136
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
A DEVELOPING SOLUTION FOR PRODUCING A COLORED PHOTOGRAPHIC IMAGE COMPRISING A SILVER HALIDE DEVELOPING AGENT HAVING THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |