US3884690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester photoconductors and matrix materials
Assignee: Xerox Corp
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Filing: 1973-09-27
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Granted: 1975-05-20
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Expires: 1993-09-27
Abstract
Abstract Active polymeric matrices, xerographic elements and a process for obtaining the monomer and polyester material by reacting an aldehyde of a desired polycyclic aromatic compound with a dicarboxy acid ester in the presence of a base to obtain an unsaturated dicarboxyester intermediate; cyanating the intermediate in the presence of alcohol to obtain a saturated Bcyano monocarboxy acid ester which is hydrolyzed to the Alpha , Beta dicarboxy intermediate and then esterified to obtain the Alpha , Beta dicarboxy ester monomer. This monomer is catalytically polymerizable with a polyhydroxy alcohol such as a glycol to obtain the polyester.
Inventors
- 👤 Jr Richard W Radler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/075; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185; C08G63/187; C08G63/78; C08G63/82; C08G63/85; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14747; G03G5/14752
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
A PHOTOCONDUCTIVE MEMBER COMPRISING A SUBSTRATE AND AT LEAST ONE ORGANIC PHOTOCONDUCTIVE LAYER COMPRISING HOLEGENERATING PHOTOCONDUCTIVE MATERIAL AND A POLYESTER OF THE FORMULA
Claim 2
Dependent Claim
23 words
A PHOTOCONDUCTIVE MEMBER COMPRISING A SUBSTRATE AND AT LEAST ONE ORGANIC PHOTOCONDUCTIVE LAYER COMPRISING HOLEGENERATING PHOTOCONDUCTIVE MATERIAL AND A POLYESTER OF THE FORMULA
Claim 3
Dependent Claim
26 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a polyester of the formula
Claim 4
Dependent Claim
26 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a polyester of the formula
Claim 5
Dependent Claim
57 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a polyester of claim 2 wherein pi is defined as a pyrene group; R3 is defined as a straight or branched polymethylene chain of 2 - 20 carbons; and the ratio of n-to-o is about 1:1.
Claim 6
Dependent Claim
58 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a polyester of claim 2 wherein pi is defined as a 1,2 benzanthracene group; R3 is defined as a straight or branched polymethylene chain of 2 - 20 carbons; and the ratio of n-to-o is about 1:1.
Claim 7
Dependent Claim
57 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a polyester of claim 2 wherein pi is defined as a chrysene group; R3 is defined as a straight or branched polymethylene chain of 2 - 20 carbons, and the ratio of n-to-o is about 1:1.
Claim 8
Dependent Claim
42 words
A xerographic photoreceptor component comprising a substrate and at least one photoconductive layer with an applied overcoat layer consisting essentially of a polyester of claim 2 wherein R3 is a divalent polycyclic aryl group; and the ratio of n-to-o is about 3:1.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |