Patent US4125701A successfully refreshed from Google Patents.
US4125701A
Expired / Lapsed
US
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Organic photoconductive materials
Assignee: Hitachi Ltd
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Filing: 1976-07-13
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Granted: 1978-11-14
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Expires: 1996-07-13
Abstract
Abstract Organic photoconductive materials comprising as an active ingredient a photoconductive copolymer consisting of 3 to 50 mole % of at least one acrylic monomer represented by the formula <IMAGE> wherein R1 is hydrogen or methyl; and R2 is a group of the formula -CnH2n+1 or a group of the formula -CH2)m X [wherein n is an integer of 0 to 18; m is an integer of 1 to 4; and X is a group of the formula -OR3 or <IMAGE> (wherein R3 is a group of the formula -ClH2l+1; and l is an integer of 0 to 4)], and 97 to 50 mole % of a photoconductive monomer having an alpha , beta -unsaturated bond.
Inventors
- 👤 Akio Mukoh
- 👤 Yasuki Mori
- 👤 Hirosada Morishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:57
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A photoconductive material comprising as an active ingredient a photoconductive copolymer consisting of 3 to 50 mole % of at least one acrylic monomer represented by the formula ##STR5## wherein R 1 is hydrogen or methyl; and R 2 is a group of the formula --C n H 2n+1 or a group of the formula --CH 2 ) m X, wherein n is an integer of 0 to 18; m is an integer of 1 to 4; and X is a group of the formula --OR 3 or ##STR6## (wherein R 3 is a group of the formula --C l H 2l +1; and l is an integer of 0 to 4), and 97 to 50 mole % of a photoconductive monomer having an α,β-unsaturated bond selected from the group consisting of [vinylanthracene,] 9-(p-vinylphenyl)anthracene[, N-vinylcarbazole, vinylacridine] and 9-(p-vinylphenyl)acridine.
Claim 2
Dependent Claim
138 words
A photoconductive material comprising as an active ingredient a photoconductive copolymer consisting of 3 to 50 mole % of at least one acrylic monomer represented by the formula ##STR5## wherein R 1 is hydrogen or methyl; and R 2 is a group of the formula --C n H 2n+1 or a group of the formula --CH 2 ) m X, wherein n is an integer of 0 to 18; m is an integer of 1 to 4; and X is a group of the formula --OR 3 or ##STR6## (wherein R 3 is a group of the formula --C l H 2l +1; and l is an integer of 0 to 4), and 97 to 50 mole % of a photoconductive monomer having an α,β-unsaturated bond selected from the group consisting of [vinylanthracene,] 9-(p-vinylphenyl)anthracene[, N-vinylcarbazole, vinylacridine] and 9-(p-vinylphenyl)acridine.
Claim 3
Dependent Claim
13 words
A photoconductive material according to claim 1, wherein said photoconductive monomer is 9-(p-vinylphenyl)anthracene.
Claim 4
Dependent Claim
13 words
A photoconductive material according to claim 1, wherein said photoconductive monomer is 9-(p-vinylphenyl)acridine.
Claim 5
Dependent Claim
34 words
A photoconductive material according to claim 2, wherein said photoconductive copolymer consists of 5 to 40 mole % of at least one of said acrylic monomers and 95 to 60 mole % of 9-(p-vinylphenyl)anthracene.
Claim 6
Dependent Claim
34 words
A photoconductive material according to claim 3, wherein said photoconductive copolymer consists of 5 to 40 mole % of at least one of said acrylic monomers and 95 to 60 mole % of 9-(p-vinylphenyl)acridine.
Claim 7
Dependent Claim
29 words
A photoconductive material according to claim 1, wherein R 2 is a group of the formula --C n H 2n+1 wherein n is an integer of 4 to 18.
Claim 8
Dependent Claim
22 words
A photoconductive material according to claim 6, wherein said acrylic monomer is present in an amount of 10 to 40 mole %.
Claim 9
Dependent Claim
79 words
A photoconductive material according to claim 1, wherein R 2 is a group of the formula --C n H 2n+1 wherein n is 0 or a group of the formula -- CH 2 ) m X, wherein m is an integer of 1 to 4, X is a group of the formula ##STR7## or --OR 3 wherein R 3 is a group of the formula --C l H 2l+ 1 and l is an integer of 0 to 4.
Claim 10
Dependent Claim
22 words
A photoconductive material according to claim 8, wherein said acrylic monomer is present in an amount of 5 to 30 mole %.
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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) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |