US3459549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bridged dihydroxynaphthalene and bridged dihydroxyanthracene silver halide developing agents and antifoggants
Assignee: Eastman Kodak Co
•
Filing: 1967-07-13
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Granted: 1969-08-05
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Expires: 1987-07-13
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Mcbride
- 👤 David F O'brien
- 👤 John W Gates Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:03
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/36; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/42; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3021; G03C5/315
Claims Analysis
Total Claims: 0
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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) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |