Patent US2457262A successfully refreshed from Google Patents.
Patent US4492746A successfully refreshed from Google Patents.
US4492746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive material with polyester binder
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1982-07-30
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Granted: 1985-01-08
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Expires: 2002-07-30
Abstract
Abstract Disclosed is a photosensitive material for electrophotography comprising an organic polymeric photoconductive material and a thermoplastic polyester composed mainly of recurring units represented by the general formula ##STR1## wherein R 1 represents a phenylene, ethylene or vinylene group, R 2 represents a group of the formula ##STR2## R 3 represents a direct bond or a divalent bridging atom or group, and the ring A may have a substituent inert to the polyester-forming reaction, provided that R 1 and R 2 are selected such that one of them contains an aromatic ring and the other does not.
Inventors
- 👤 Nobuhiro Miyakawa
- 👤 Teruaki Higashiguti
- 👤 Yumiko Sano
- 👤 Masatomi Funato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/193; C08G63/199; C08G63/52; C08G63/54; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0557; G03G5/056; G03G5/06; G03G5/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A photosensitive material for electrophotography comprising an organic polymeric photoconductive material selected from the group consisting of poly-N-vinyl carbazole and its nuclear substitutions, polyvinyl anthracene, polyvinylpyrene and polyacenaphthylene and a thermoplastic polyester composed mainly of recurring units represented by the general formula ##STR13## wherein R 1 is a phenylene group, R 2 is a group of the formula ##STR14## R 3 is a direct bond or a divalent bridging atom or group.
Claim 2
Dependent Claim
72 words
A photosensitive material for electrophotography comprising an organic polymeric photoconductive material selected from the group consisting of poly-N-vinyl carbazole and its nuclear substitutions, polyvinyl anthracene, polyvinylpyrene and polyacenaphthylene and a thermoplastic polyester composed mainly of recurring units represented by the general formula ##STR13## wherein R 1 is a phenylene group, R 2 is a group of the formula ##STR14## R 3 is a direct bond or a divalent bridging atom or group.
Claim 3
Dependent Claim
31 words
The photosensitive material of claim 1 wherein the amount of the thermoplastic polyester is 10 to 300 parts by weight, per 100 parts by weight of the organic polymeric photoconductive material.
Claim 4
Dependent Claim
33 words
The photosensitive material of claim 1 wherein the amount of the thermoplastic polyester is from about 100 to 300 parts by weight, per 100 parts by weight of the organic polymeric photoconductive material.
Claim 5
Dependent Claim
21 words
The photosensitive material of claim 1 wherein the thermoplastic polyester is composed mainly of recurring units represented by the formula ##STR15##
Claim 6
Dependent Claim
21 words
The photosensitive material of claim 1 wherein the thermoplastic polyester is composed mainly of recurring units represented by the formula ##STR16##
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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |