Patent US3754909A successfully refreshed from Google Patents.
US3754909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester coated paper as a conductive sheet material
Assignee: Beazer East Inc
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Filing: 1972-03-20
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Granted: 1973-08-28
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Expires: 1992-03-20
Abstract
Abstract An electrically conductive sheet material prepared from paper and a particular class of polyester resins is disclosed. The use of this conductive paper as the substrate in preparing a photoconductive recording sheet material is also disclosed.
Inventors
- 👤 J Feltzin
- 👤 E Kuehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:18
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/101
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
An electrically conductive sheet material according to claim 1 wherein said dicarboxylic acid is selected from unsaturated dicarboxylic acids and mixtures of unsaturated dicarboxylic acids containing at least about 50% unsaturated dicarboxylic acid and wherein in said etherified diphenol the sum of m and n is at most 20 and at least 9.
Claim 2
Dependent Claim
53 words
An electrically conductive sheet material according to claim 1 wherein the said etherified diphenol is selected from the group consisting of polyoxypropylene 2,2-bis(4-hydroxyphenyl) propane; polyoxyethylene 2,2-bis(4-hydroxyphenyl propane; polyoxyethylene 2,2-bis(4-hydroxy-2,6-dichloro-phenyl) propane; and polyoxypropylene 2,2-bis(4-hydroxy-2,6-dichlorophenyl) propane; and wherein the number of polyoxypropylene or polyoxyethylene units per mol of etherified diphenol is from 9 to 20.
Claim 3
Dependent Claim
77 words
An electrically conductive sheet material according to claim 1 wherein said conductive polyester resin has been modified with a modifying agent selected from the group consisting of an ethylenically unsaturated monomer, a polyfunctional hydroxy compound dispersible in aromatic hydrocarbons, a polyisocyanate, a di- or triamine, and an alkaline earth or alkali metal hydroxide and wherein from 1 to 50 parts of modifying agent are present per 100 parts of the combination of polyester resin and modifying agent.
Claim 4
Dependent Claim
42 words
An electrically conductive sheet material according to claim 4 wherein said ethylenically unsaturated monomer is homopolymerizable, said polyisocyanate contains an average of more than 2.5 isocyanate groups per molecule, and said di- and triamines are either saturated acyclic, alicyclic, or aromatic compounds.
Claim 5
Dependent Claim
38 words
An electrically conductive sheet material according to claim 1 wherein a film extending material is in admixture with said conductive polyester resin in a weight ratio of from 3 to 0.5 parts of film extender to polyester resin.
Claim 6
Dependent Claim
44 words
A photoconductive paper composition which comprises an electrically conductive sheet material of claim 1 coated with a photoconductive composition containing a photoconductive pigment and a binder resin wherein the weight ratio of said photoconductive material to said binder resin is from 15 to 2.5.
Claim 7
Dependent Claim
46 words
A photoconductive paper composition which comprises an electrically conductive sheet material of claim 4 and a photoconductive composition coated thereon which comprises a photoconductive pigment and a binder resin wherein the weight ratio of said photoconductive material to said binder resin is from 15 to 2.5.
Claim 8
Dependent Claim
59 words
A photoconductive paper composition which comprises an electrically conductive sheet material of claim 1 coated with a photoconductive composition comprising a photoconductive pigment and a binder resin wherein said binder resin is an electrically non-conductive polyester resin of a dicarboxylic acid and a polyol composition which contains a short chain etherified diphenol which may be represented by the formula:
Claim 9
Dependent Claim
59 words
A photoconductive paper composition which comprises the electrically conductive sheet material of claim 4 coated with a photoconductive composition consisting of a photoconductive pigment and binder resin wherein said binder resin is an electrically non-conductive polyester resin of a dicarboxylic acid and a polyol composition which contains a short chain etherified diphenol which may be represented by the formula:
Claim 10
Dependent Claim
29 words
A photoconductive paper composition according to claim 9 wherein said polyol composition includes up to 60 weight percent of a dihydroxy alkAne containing from 2 to 8 carbon atoms.
Claim 11
Dependent Claim
63 words
A photoconductive paper composition according to claim 9 wherein said polyol composition contains up to about 3 weight percent of a polyhydroxy alkane containing from 3 to 6 carbon atoms and from 3 to 6 groups or an ethylene or propylene oxide derivative of said polyhydroxy alkane, said derivative containing up to 10 mols of oxide per hydroxyl group of said polyhydroxy alkane.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |