US3592646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazo compounds and photographic elements
Assignee: Eastman Kodak Co
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Filing: 1968-03-20
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Granted: 1971-07-13
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Expires: 1988-03-20
Abstract
Abstract A LIGHT-SENSITIVE 1,2-DIAZO KETONE TRIHALOMETHANE COMPOUND IS EMPLOYED IN PHOTOGRAPHIC ELEMENTS WITH OR WITHOUT GELATIN OR AN ALKALI-IMSOLUBLE POLYMER WHEREIN BOTH POSITIVE OR NEGATIVE IMAGES ARE OBTAINED WITH UTILITY IN PHOTOMECHANICAL REPRODUCTIONS AND PHOTORESIST APPLICATIONS.
Inventors
- 👤 Colin Holstead
- 👤 Abbotts Langley
- 👤 Wojciech Maria Prezezdziecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:11
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/0163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |