US3944705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording material and manufacture thereof
Assignee: Kanzaki Paper Manufacturing Co Ltd
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Filing: 1974-05-20
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Granted: 1976-03-16
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Expires: 1994-05-20
Abstract
Abstract In an electrostatic recording material comprising an electroconductive base sheet and a dielectric layer supported thereon, the electrostatic recording material being characterized in that the dielectric layer contains 10 to 70 wt.% of non-conductive and non-photoconductive finely divided powder coated with organopolysiloxane.
Inventors
- 👤 Hironari Fujioka
- 👤 Takao Matsushita
- 👤 Taiji Higaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:46
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0217; G03G5/0214; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
In an electrostatic recording material consisting essentially of an electroconductive base sheet and a dielectric layer of organic polymer materials supported thereon, the electrostatic recording materials being characterized in that the dielectric layer contains 10 to 70 wt. % of non-conductive and non-photoconductive finely divided powder coated with organopolysiloxane having the organosiloxane units represented by the formula of ##EQU3## wherein R 1 is an organo group and R 2 is an organo group, hydrogen atom, hydroxyl or halogen atom.
Claim 2
Dependent Claim
79 words
In an electrostatic recording material consisting essentially of an electroconductive base sheet and a dielectric layer of organic polymer materials supported thereon, the electrostatic recording materials being characterized in that the dielectric layer contains 10 to 70 wt. % of non-conductive and non-photoconductive finely divided powder coated with organopolysiloxane having the organosiloxane units represented by the formula of ##EQU3## wherein R 1 is an organo group and R 2 is an organo group, hydrogen atom, hydroxyl or halogen atom.
Claim 3
Dependent Claim
16 words
The electrostatic recording material as set forth in claim 1 wherein the organopolysiloxane is cross-linked organopolysiloxane.
Claim 4
Dependent Claim
23 words
The electrostatic recording material as set forth in claim 2 wherein the cross-linked organopolysiloxane is a condensation product of polysiloxanes having organohydroxysiloxane units.
Claim 5
Dependent Claim
28 words
The electrostatic recording material as set forth in claim 2 wherein the cross-linked organopolysiloxane is a condensation product of polysiloxane having organohydroxysiloxane units and polysiloxane having organohydrogensiloxane units.
Claim 6
Dependent Claim
28 words
The electrostatic recording material as set forth in claim 2 wherein the cross-linked organopolysiloxane is a condensation product of polysiloxane having organohydroxysiloxane units and polysiloxane having alkoxysiloxane units.
Claim 7
Dependent Claim
31 words
The electrostatic recording material as set forth in claim 2 wherein the cross-linked organopolysiloxane is an addition polymer of polysiloxane having organosiloxane units containing vinyl group and polysiloxane having organohydrogensiloxane units.
Claim 8
Dependent Claim
21 words
The electrostatic recording material as set forth in claim 1 wherein the non-conductive and non-photoconductive finely divided powder is calcined clay.
Claim 9
Dependent Claim
28 words
The electrostatic recording material as set forth in claim 1 wherein the non-conductive and non-photoconductive finely divided powder has an average particle size of 0.1 to 10 μ.
Claim 10
Dependent Claim
36 words
The electrostatic recording material as set forth in claim 1 wherein the non-conductive and non-photoconductive finely divided powder is coated with the organopolysiloxane in an amount of at least 0.1 wt.% based on the fine powder.
Claim 11
Dependent Claim
25 words
The electrostatic recording material as set forth in claim 9 wherein the amount of the organopolysiloxane is in the range of 1 to 6 wt.%.
Claim 12
Dependent Claim
93 words
The electrostatic recording material as set forth in claim 1 wherein said organo groups shown by R 1 and R 2 are each an alkyl group having 1 to 5 carbon atoms, acyl group having 2 to 4 carbon atoms, aminoalkyl group having 2 to 4 carbon atoms, iminoalkyl group having 2 to 4 carbon atoms, aralkyl group having 7 to 10 carbon atoms, phenyl group, alkoxyl group having 1 to 5 carbon atoms, acyloxyl group having 1 to 5 carbon atoms, alkenyl group having 2 to 8 carbon atoms or glycidyloxyl group.
Claim 13
Dependent Claim
22 words
The electrostatic recording material as set forth in claim 1, wherein said electroconductive base sheet is paper having a reduced electric resistivity.
References Cited (Backward Citations)
US3526533A
Cited
US3516854A
Cited
US3504625A
Cited
US3634135A
Cited
US3833366A
Cited
US3672928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |