US3899328A
Expired / Lapsed
US
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Active matrix and intrinsic photoconductive polymer of a linear polysiloxane
Assignee: Xerox Corp
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Filing: 1973-05-07
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Granted: 1975-08-12
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Expires: 1993-05-07
Abstract
Abstract and in the presence of tetramethylammonium silanolate or corresponding alkali metal salt as initiators; the polymeric product, and photoconductive members utilizing such product demonstrate excellent structural and electronic properties for xerographic purposes. A process for obtaining a substantially linear homopolymer and/or copolymeric material from a cyclic trimer such as 1,3,5trimethyl-1,3,5-tri(N-ethyl-3-carbazyl)cyclotrisiloxane alone or in combination with cyclic trimers or tetramers exemplified by the formulae
Inventors
- 👤 William W Limburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:22
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/06; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0557; G03G5/0578; G03G5/06; G03G5/07; G03G5/078; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14747; G03G5/14773
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
22 words
A PHOTOCONDUCTIVE MEMBER COMPRISING A SUBSTRATE AND AT LEAST ONE ORGANIC PHOTOCONDUCTIVE LAYER COMPRISING AN INTRINSIC POLYMERIC PHOTOCONDUCTIVE MATERIAL OF THE FORMULAE
Claim 2
Dependent Claim
22 words
A PHOTOCONDUCTIVE MEMBER COMPRISING A SUBSTRATE AND AT LEAST ONE ORGANIC PHOTOCONDUCTIVE LAYER COMPRISING AN INTRINSIC POLYMERIC PHOTOCONDUCTIVE MATERIAL OF THE FORMULAE
Claim 3
Dependent Claim
10 words
A photoconductive member utilizing the polymeric material of the formula
Claim 4
Dependent Claim
10 words
A photoconductive member utilizing the polymeric material of the formula
Claim 5
Dependent Claim
10 words
A photoconductive member utilizing the polymeric material of the formula
Claim 6
Dependent Claim
10 words
A photoconductive member utilizing the polymeric material of the formula
Claim 7
Dependent Claim
28 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied active matrix overcoat layer consisting essentially of a polysiloxane of the formulae
Claim 8
Dependent Claim
28 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied active matrix overcoat layer consisting essentially of a polysiloxane of the formulae
Claim 9
Dependent Claim
64 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of the linear polysiloxane of claim 4 wherein R1, R4 and R5 are individually defined as an alkyl group of 1-3 carbon atoms; R2 is an aromatic polycyclic group having at least three fused ring nuclei; and R3 and R6 are polymeric end groups.
Claim 10
Dependent Claim
49 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of the linear polysiloxane of claim 4 wherein R1, R4 and R5 are individually defined as an alkyl group of 1-3 carbon atoms; and R2 is a heterocyclic group.
Claim 11
Dependent Claim
27 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a linear polysiloxane of the formula
Claim 12
Dependent Claim
27 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a linear polysiloxane of the formula
Claim 13
Dependent Claim
27 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a linear polysiloxane of the formula
Claim 14
Dependent Claim
27 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a linear polysiloxane of the formula
Claim 15
Dependent Claim
48 words
A photoconductive member of claim 1 wherein R1, R4 and R5 in the polysiloxane polymeric material are individually defined as an alkyl group of 1-3 carbon atoms; R2 is an aromatic polycyclic group having at least 3 fused ring nuclei; and R3 and R6 are polymeric end groups.
Claim 16
Dependent Claim
33 words
A photoconductive member of claim 1 wherein R1, R4 and R5 in the polysiloxane polymeric material are individually defined as an alkyl group of 1-3 carbon atoms; and R2 is a heterocyclic group.
Claim 17
Dependent Claim
18 words
A photoconductive member of claim 10 wherein R2 is an aromatic polycyclic group having four fused ring nuclei.
Claim 18
Independent Claim
61 words
A method for obtaining photoreceptor elements having improved electronic and mechanical properties for xerographic copying purposes, said elements having at least a charge conductive substrate and a photoconductive layer, the improvement comprising applying onto the substrate at least one of (1) the photoconductive layer, or (2) an overcoat layer having as a polymeric component a linear polymer represented by the formulae
Claim 19
Independent Claim
61 words
A method for obtaining photoreceptor elements having improved electronic and mechanical properties for xerographic copying purposes, said elements having at least a charge conductive substrate and a photoconductive layer, the improvement comprising applying onto the substrate at least one of (1) the photoconductive layer, or (2) an overcoat layer having as a polymeric component a linear polymer represented by the formulae
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |