US3595649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic recording plate for lithography
Assignee: Ricoh Co Ltd
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Filing: 1968-03-25
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Granted: 1971-07-27
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Expires: 1988-03-25
Abstract
Abstract AN ELECTROPHOTOGRAPHIC COPYING PAPER WHICH IS COMPRISED OF A SUPPORT SHEET, AN INTERMEDIATE LAYER FORMED ON ONE SURFACE OF SAID SUPPORT SHEET WITH A WATER-SOLUBLE THERMO-SETTING RESIN CONTAINING A HYDROXYMETHYL RADICAL, 3 PHOTOCONDUCTIVE LAYER CONSISTING OF A PHOTOCONDUCTIVE SUBSTANCE SECURELY ADHERED TO THE UPPER SURFACE OF SAID INTERMEDIATE LAYER BY THE USE OF A THERMOSETTING RESIN HAVING A HYDROXYETHYL RADICAL AND A CARBOXYL RADICAL, AND A LAYER OF LOW ELECTRIC RESISTANCE PROVIDED ON THE REVERSE SURFACE OF SAID SUPPORT SHEET, SERVES AS A HIGHLY SATISFACTORY RECORDING PLATE FOR LITHOGRAPHY.
Inventors
- 👤 Sakae Shimizu
- 👤 Junji Kurokawa
- 👤 Takayoshi Tanno
- 👤 Noriyuki Usui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:48
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0532; G03G5/0546; G03G5/0592
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |