Patent US890053A successfully refreshed from Google Patents.
Patent US3709684A successfully refreshed from Google Patents.
US3709684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive compositions and elements employing polyoxyalkylene bisphenol a fumarates as binders
Assignee: Beazer East Inc
•
Filing: 1970-12-11
•
Granted: 1973-01-09
•
Expires: 1990-12-11
Abstract
Abstract Photoconductive recording materials for use in electrophotography processes are disclosed. A photoconductive composition for use in preparing the photoconductive recording materials is also disclosed as well as means for preparing the photoconductive recording materials. The particular photoconductive composition contains polyester resins based upon an etherified diphenol material and a dicarboxylic acid.
Inventors
- 👤 J Feltzin
- 👤 E Kuehn
- 👤 G Rudkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0557; G03G5/056
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
32 words
A photoconductive composition to claim 1 wherein said polyol contains in addition to said etherified diphenol polyol up to 60 weight percent of a dihydroxy alkane containing 2 to 8 carbon atoms.
Claim 2
Dependent Claim
64 words
A photoconductive composition according to claim 1 wherein said polyol contains up to 3 parts per 100 parts by weight of said etherified diphenol of a polyhydroxy alkane containing 3 to 6 carbon atoms and 3 to 6 hydroxyl groups or an ethylene or propylene oxide derivative of said polyhydroxy alkane containing up to 5 mols of propylene or ethylene oxide per hydroxyl group.
Claim 3
Dependent Claim
54 words
A photoconductive composition according to claim 1 wherein said electrically insulating polyester resin composition is modified with up to about 4 percent by weight based on said insulating polyester resin of either an organic epoxy compound having a molecular weight from about 44 to 1000, or an alkoxylated phenol, or an alkoxylated alkyl phenol.
Claim 4
Dependent Claim
27 words
A photoconductive composition according to claim 1 wherein said photoconductive pigment is selected from the group consisting of zinc oxide, zinc sulfide, antimony dioxide, and selenium oxide.
Claim 5
Dependent Claim
52 words
A photoconductive composition according to claim 1 wherein said etherified diphenol is an etherified bisphenol and said bisphenol is selected from the group consisting of 2,2-bis(4-hydroxyphenyl) propane; 2,2-bis(2,6-dichloro-4-hydroxy-phenyl) propane; and 2,2-bis(2,6-dibromo-4-hydroxyphenyl) propane, and said etherified bisphenol contain from two to four mols of oxyethylene or oxypropylene groups per mol of etherified bisphenol.
Claim 6
Dependent Claim
59 words
A photoconductive composition according to claim 4 wherein said organic epoxy compound is selected from the group consisting of 3,4-epoxy cyclohexylethyl trimethoxysiliane, diglycidyl ether of 2,2-di(hydroxyphenyl) propane, phenylglycidyl ether, 1,2-epoxy eicosane, propylene oxide, ethylene oxide, and epichlorohydrin; and said alkoxylated phenol or alkoxylated alkyl phenol is selected from the group consisting of hydroxyethyl, 2-methylphenyl ether; polyoxybutylene(15)-6-propylphenol, and polyoxpropylene(3) phenol.
Claim 7
Dependent Claim
28 words
A photoconductive composition according to claim 2 wherein said polyol consists of said dihydroxy alkane and said etherified diphenol in a weight ratio of from 1.5 to 0.67.
Claim 8
Dependent Claim
17 words
A photoconductive recording material which comprises a conductive substrate coated with a photoconductive composition of claim 1.
Claim 9
Dependent Claim
21 words
A photoconductive recording material according to claim 9 wherein said conductive substrate consists essentially of paper coated with a conductive resin.
Claim 10
Dependent Claim
33 words
A photoconductive recording material which comprises a conductive substrate consisting essentially of paper coated with a conductive resin, coated with a photoconductive composition wherein said photoconductive composition is a composition of claim 4.
Claim 11
Dependent Claim
25 words
A composition of claim 1 wherein the dicarboxylic acid component is selected from the group consisting of fumaric, maleic, and succinic acids and anhydrides thereof.
Claim 12
Dependent Claim
25 words
A composition of claim 6 wherein the dicarboxylic acid component is selected from the group consisting of fumaric, maleic, and succinic acids and anhydrides thereof.
References Cited (Backward Citations)
US3025160A
Cited
US3406063A
Cited
US3245786A
Cited
US3408184A
Cited
US3437481A
Cited
US3396016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |