US3764590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic photoconductive materials
Assignee: Hitachi Ltd
•
Filing: 1971-04-06
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Granted: 1973-10-09
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Expires: 1991-04-06
Abstract
Abstract A novel compound 9-(p-vinylphenyl)anthracene is prepared by the reaction of anthrone or 9-substituted anthracene with a psubstituted styrene. Polymers or copolymers of 9-(pvinylphenyl)anthracene or brominated thereof show excellent photoconductivity.
Inventors
- 👤 A Mukoh
- 👤 S Nozaki
- 👤 A Hagitani
- 👤 Y Mori
- 👤 K Sakashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:04
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; C; C08; C08F; C08F12/00; C08F12/02; C08F12/32; C08F8/00; C08F8/18; C08F8/20; C08L; C08L25/00; C08L25/02; C08L25/18; C09; C09D; C09D125/00; C09D125/02; C09D125/18; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F226/00; C08F226/06; C08F226/12; C08L2205/00; C08L2205/02; C08L25/04; C08L25/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
34 words
A novel copolymer for use in a photoconductive material which is synthesized by copolymerizing a substantial amount of 9-(p-vinylphenyl) anthracene and another polymerizable vinyl monomer, said copolymer containing the following structure in its molecule:
Claim 2
Dependent Claim
50 words
A brominated polymer for use in photoconductive material which is obtained by brominating a polymer selected from the group consisting of a homopolymer of 9-(p-vinylphenyl) anthracene and a copolymer of a substantial amount of 9-(p-vinylphenyl) anthracene and another polymerizable vinyl monomer, said polymer containing the following structure in its molecule:
Claim 3
Dependent Claim
15 words
A process for producing a homopolymer of 9-(p-vinylphenyl)anthracene containing the following structure in its molecule:
Claim 4
Dependent Claim
21 words
A process for producing a copolymer comprising 9-(p-vinylphenyl)anthracene and another polymerizable vinyl monomer and contAining the following structure in its molecule:
Claim 5
Dependent Claim
19 words
A process for producing a brominated polymer characterized in that a polymer containing the following structure in its molecule:
Claim 6
Dependent Claim
20 words
The polymer of claim 1, wherein said homopolymer has a molecular weight in the range of from 2,000 to 150,000.
Claim 7
Dependent Claim
20 words
The copolymer of claim 2, wherein said copolymer has a molecular weight in the range of from 2,000 to 150,000.
Claim 8
Dependent Claim
23 words
The copolymer of claim 2, wherein said vinyl monomer is selected from the group consisting of styrene, acrylonitrile, N-vinyl carbazole, and vinyl acetate.
Claim 9
Dependent Claim
21 words
The brominated polymer of claim 3, wherein said polymer has a molecular weight in the range of from 2,000 to 150,000.
Claim 10
Dependent Claim
24 words
The brominated polymer of claim 3, wherein said vinyl monomer is selected from the group consisting of styrene, acrylonitrile, N-vinyl carbazole, and vinyl acetate.
Claim 11
Dependent Claim
43 words
The process of claim 4, wherein said catalyst is a radical polymerization initiator and said polymerization is effected at 60* to 200*C for 2 to 40 hours to produce a homopolymer having a molecular weight in the range of from 2,000 to 150,000.
Claim 12
Dependent Claim
42 words
The process of claim 4, wherein said catalyst is a Ziegler-type catalyst and the polymerization is effected at 30 to 250*C for 10 to 100 hours to produce a homopolymer having a molecular weight in the range of from 2,000 to 150,000.
Claim 13
Dependent Claim
43 words
The process of claim 5, wherein said catalyst is a radical polymerization initiator and said polymerization is effected at 60* to 200*C for 2 to 40 hours to produce a homopolymer having a molecular weight in the range of from 2,000 to 150,000.
Claim 14
Dependent Claim
42 words
The process of claim 5, wherein said catalyst is a Ziegler-type catalyst and the polymerization is effected at 30 to 250*C for 10 to 100 hours to produce a homopolymer having a molecular weight in the range of from 2,000 to 150,000.
Claim 15
Dependent Claim
20 words
The process of claim 6, wherein said polymer has a molecular weight in the range of from 2,000 to 150,000.
Claim 16
Dependent Claim
23 words
The process of claim 6, wherein said vinyl monomer is selected from the group consisting of styrene, acrylonitrile, N-vinyl carbazole and vinyl acetate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |