Patent US4950571A successfully refreshed from Google Patents.
US4950571A
Expired / Lapsed
US
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Photosensitive member composed of charge transporting layer and charge generating layer
Assignee: Minolta Co Ltd
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Filing: 1989-06-30
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Granted: 1990-08-21
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Expires: 2009-06-30
Abstract
Abstract The present invention relates to a photosensitive member having an a-C layer as a charge transporting layer, which a-C layer is specified in the ratio of the number of saturated carbon bonding with hydrogen to the number of saturated carbon not bonding with hydrogen or in the ratio of the number of unsaturated carbon bonding with hydrogen to the number of unsaturated carbon not bonding with hydrogen; the photosensitive member has an excellent charge transportability as well as a chargeability.
Inventors
- 👤 Hideo Hotomi
- 👤 Izumi Osawa
- 👤 Mitsutoshi Nakamura
- 👤 Shuji Iino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:57
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08278; G03G5/06; G03G5/07; G03G5/08221; G03G5/08235; G03G5/08285
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A photosensitive member comprising: an electrically conductive substrate; a charge generating layer; and a charge transporting layer comprising amorphous carbon containing hydrogen and having a thickness of about 5 to about 50 microns, said amorphous carbon comprising saturated carbon n 1 linked with hydrogen and saturated carbon n 2 free from linking with hydrogen, the ratio of the number n 1 to that of N 2 being 1:0.5 to 1:0.14, said hydrogen being contained in an amount of 20 to 67 atomic %.
Claim 2
Dependent Claim
83 words
A photosensitive member comprising: an electrically conductive substrate; a charge generating layer; and a charge transporting layer comprising amorphous carbon containing hydrogen and having a thickness of about 5 to about 50 microns, said amorphous carbon comprising saturated carbon n 1 linked with hydrogen and saturated carbon n 2 free from linking with hydrogen, the ratio of the number n 1 to that of N 2 being 1:0.5 to 1:0.14, said hydrogen being contained in an amount of 20 to 67 atomic %.
Claim 3
Dependent Claim
27 words
A photosensitive member as claimed in claim 1 wherein said ratio of the amount of N 1 to that of N 2 is preferably 1:0.17 to 1:0.4.
Claim 4
Dependent Claim
27 words
A photosensitive member as claimed in claim 1 wherein said amorphous carbon includes saturated carbon in an amount of 40 to 90% based on all carbon atoms.
Claim 5
Dependent Claim
23 words
A photosensitive member as claimed in claim 1 wherein said saturated carbon N 1 and N 2 include neo-carbon methine methylene or methyl.
Claim 6
Dependent Claim
83 words
A photosensitive member comprising: an electrically conductive substrate; a charge generating layer; and a charge transporting layer comprising amorphous carbon containing hydrogen and having a thickness of about 5 to about 50 microns, said amorphous carbon comprising unsaturated carbon n 3 linked with hydrogen and unsaturated carbon N 4 free from linking with hydrogen, the ratio of the number N 3 to that of N 4 being 1:4 to 1:0.2, said hydrogen being contained in an amount of 20 to 67 atomic %.
Claim 7
Dependent Claim
83 words
A photosensitive member comprising: an electrically conductive substrate; a charge generating layer; and a charge transporting layer comprising amorphous carbon containing hydrogen and having a thickness of about 5 to about 50 microns, said amorphous carbon comprising unsaturated carbon n 3 linked with hydrogen and unsaturated carbon N 4 free from linking with hydrogen, the ratio of the number N 3 to that of N 4 being 1:4 to 1:0.2, said hydrogen being contained in an amount of 20 to 67 atomic %.
Claim 8
Dependent Claim
27 words
A photosensitive member as claimed in claim 5 wherein said ratio of the number of N 3 to that of N 4 is preferably 1:2 to 1:0.5.
Claim 9
Dependent Claim
27 words
A photosensitive member as claimed in claim 5 wherein said amorphous carbon includes unsaturated carbon in an amount of 5 to 50% based on all carbon atoms.
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |