Patent US2652168A successfully refreshed from Google Patents.
US3674495A
Expired / Lapsed
US
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Sensitizing layer
Assignee: Okamoto Chemical Industry Co Ltd
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Filing: 1969-09-05
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Granted: 1972-07-04
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Expires: 1989-09-05
Abstract
Abstract A SENSITIZING LAYER CONTAINING AN ESTER OF A COMPOUND OF THE GENERAL FORMULA HO-R-N=N-R''-N(-X)-Y (WHEREIN R REPRESENTS A BENZENE OR NAPHTHALENE NUCLEUS WITH A RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROXYL, HALOGEN, NITRO, ALKYL AND ALKOXY; R'' REPRESENTS A BENZENE NUCLEUS WHICH MAY CONTAIN A RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROXYL (-OH), HALOGEN (-CL, F, BR, I), NITRO (-NO2), ALKYL (-CNH2N+1) AND ALKOXY (-OCNH2N+1); AND X AND Y INDIVIDUALLY REPRESENT A RADICAL OF ALKYL, ALKYLALCOHOL (-CNH2N$OH) OR ALKOXY) WITH A DIAZONAPHTHOLSULFONIC ACID.
Inventors
- 👤 Teruo Esaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:13
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |