Patent US3924050A successfully refreshed from Google Patents.
US3924050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric layer composition
Assignee: Dow Chemical Co
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Filing: 1973-06-29
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Granted: 1975-12-02
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Expires: 1993-06-29
Abstract
Abstract There is disclosed a paper which is suitable for use in electrostatic printing, said paper being coated on at least one side with a dielectric composition, which is useful particularly at relatively high humidities, consisting of 15 to 85 volume % of a copolymer of vinylidene chloride and at least one other olefinically unsaturated monomer, 8 to 77 volume % of an epoxy resin having an epoxy equivalent weight between 400 and 60,000, and, optionally, 0 to 42 volume % of a pigment.
Inventors
- 👤 Carolyn J Camp
- 👤 Robert O Lindblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:30
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/002; H01B3/006; C; C08; C08L; C08L63/00; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/08; G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0208; G03G5/0211; G03G5/0217; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PAPER SUITABLE FOR USE IN ELECTROSTATIC PRINTING PROCESSES COMPRISING AN ELECTROGRAPHIC PAPER COATED ON AT LEAST ONE SIDE WITH AN EFFECTIVE AMOUNT OF A DIELECTRIC COATING POSITION CONSISTING ESSENTIALLY OF A. 15 TO 85 VOLUME % OF A COPOLYMER OF 70 TO 96 WEIGHT % VINYLIDENE CHLORIDE, THE REMAINDER BEING AT LEAST ONE OTHER OLEFINICALLY UNSATURATED COMONOMER POLYMERIZABLE THEREWITH, SAID COMPLYMER HAVING A MOLECULAR WEIGHT DESCRIBED BY A RELATIVE VISCOSITY OF BETWEEN ABOUT 1.2 AND 3.5 FOR A 1% TETRAHYDROFURAN SOLUTION AT 25*C.; B. 8 TO 77 VOLUME % OF AN EPOXY RESIN HAVING AN EPOXY EQUIVALENT WEIGHT OF ABOUT 400 TO 60,000, SAID EPOXY RESIN BEING OF THE FORMULA
Claim 2
Dependent Claim
111 words
A PAPER SUITABLE FOR USE IN ELECTROSTATIC PRINTING PROCESSES COMPRISING AN ELECTROGRAPHIC PAPER COATED ON AT LEAST ONE SIDE WITH AN EFFECTIVE AMOUNT OF A DIELECTRIC COATING POSITION CONSISTING ESSENTIALLY OF A. 15 TO 85 VOLUME % OF A COPOLYMER OF 70 TO 96 WEIGHT % VINYLIDENE CHLORIDE, THE REMAINDER BEING AT LEAST ONE OTHER OLEFINICALLY UNSATURATED COMONOMER POLYMERIZABLE THEREWITH, SAID COMPLYMER HAVING A MOLECULAR WEIGHT DESCRIBED BY A RELATIVE VISCOSITY OF BETWEEN ABOUT 1.2 AND 3.5 FOR A 1% TETRAHYDROFURAN SOLUTION AT 25*C.; B. 8 TO 77 VOLUME % OF AN EPOXY RESIN HAVING AN EPOXY EQUIVALENT WEIGHT OF ABOUT 400 TO 60,000, SAID EPOXY RESIN BEING OF THE FORMULA
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |