Patent US3811894A successfully refreshed from Google Patents.
US3811894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive aluminum plate and process for preparing the same
Assignee: Fujifilm Holdings Corp
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Filing: 1970-08-31
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Granted: 1974-05-21
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Expires: 1990-08-31
Abstract
Abstract A photosensitive plate comprising an aluminum support containing from 0.05 to 1.0 percent by weight copper and having thereon a finely porous oxide layer formed by the anodization of said support, said oxide layer carrying a photosensitive material, is disclosed. A process for preparing the photosensitive aluminum plate is also disclosed.
Inventors
- 👤 T Yonezawa
- 👤 A Shirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
The photosensitive plate as claimed in claim 1 wherein said photosensitive material is selected from the group consisting of a silver halide; a diazo compound; ammonium iron citrate and a red prussiate; an organic halogen compound and diphenylamine; a compound changing color depending upon the pH and a compound converted to an acid or base upon light irradiation; a quinone diazaido derivative; a leuco compound and an organic halogen generator; and a photochromic dye.
Claim 2
Dependent Claim
19 words
The photosensitive plate as claimed in claim 1, wherein said copper ranges from 0.12 to 0.30 percent by weight.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |