US3930080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording materials
Assignee: Kanzaki Paper Manufacturing Co Ltd
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Filing: 1974-03-19
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Granted: 1975-12-30
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Expires: 1994-03-19
Abstract
Abstract In an electrostatic recording material comprising an electroconductive base sheet having a dielectric layer on which a negatively charged electrostatic image of electrical signal is to be formed, an improvement which is characterized in that said dielectric layer contains at least one of guanidine compounds selected from the group consisting of guanidine, guanidine derivatives and salts thereof in a proportion of 0.05 to 20 weight percent.
Inventors
- 👤 Tadashi Tanimoto
- 👤 Kazuo Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:09
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0214
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
IN AN ELECTROSTATIC RECORDING MATERIAL CONSISTING ESSENTIALLY OF AN ELECTROCONDUCTIVE BASE SHEET HAVING A DIELECTRIC LAYER ON WHICH A NEGATUIVELY CHARGED ELECTROSTATIC IMAGE OF ELECTRICAL SIGNAL IS TO BE FORMED, AN IMPROVEMENT WHICH IS CHARACTERIZED IN THAT SAID DIELECTRIC LAYER CONTAINS AT LEAST ONE OF GUANIDINE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF GUANIDINE, GUANIDINE DERIVATIVES, AND SALTS THEREOF IN A PROPORTION OF 0.05 TO 20 WEIGHT PERCENT.
Claim 2
Dependent Claim
68 words
IN AN ELECTROSTATIC RECORDING MATERIAL CONSISTING ESSENTIALLY OF AN ELECTROCONDUCTIVE BASE SHEET HAVING A DIELECTRIC LAYER ON WHICH A NEGATUIVELY CHARGED ELECTROSTATIC IMAGE OF ELECTRICAL SIGNAL IS TO BE FORMED, AN IMPROVEMENT WHICH IS CHARACTERIZED IN THAT SAID DIELECTRIC LAYER CONTAINS AT LEAST ONE OF GUANIDINE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF GUANIDINE, GUANIDINE DERIVATIVES, AND SALTS THEREOF IN A PROPORTION OF 0.05 TO 20 WEIGHT PERCENT.
Claim 3
Dependent Claim
28 words
The electrostatic recording material according to claim 1 in which said guanidine compound is at least one of a) guanidine and b) guanidine derivatives represented by the formula
Claim 4
Dependent Claim
23 words
The electrostatic recording material according to claim 2 in which said aliphatic hydrocarbon group is an alkyl group, alkenyl group or alicyclic group.
Claim 5
Dependent Claim
52 words
The electrostatic recording material according to claim 2 in which said substituted aliphatic hydrocarbon group, substituted alkoxyl group, substituted acyl group, substituted amino group or substituted guanyl group has a substituent of a hydroxyl group, alkoxyl group, amino group, phenyl group, carboxyl group, cyano group, nitro group, nitroso group or halogen atom.
Claim 6
Dependent Claim
38 words
The electrostatic recording material according to claim 2 in which said substituted phenyl group has a substituent of an alkyl group, halogen atom, nitro group, hydroxyl group, alkoxyl group, amino group, carboxyl group, cyano group or nitroso group.
Claim 7
Dependent Claim
31 words
The electrostatic recording material according to claim 2 in which each of said R1 to R5 is a hydrogen atom, phenyl group, amino group, guanyl group, nitro group or cyano group.
Claim 8
Dependent Claim
22 words
The electrostatic recording material according to claim 2 in which at least two of R1 to R5 are each a hydrogen atom.
Claim 9
Dependent Claim
45 words
The electrostatic recording material according to claim 2 in which at least two of R1 to R5 are each a hydrogen atom, the rest of R1 to R5, if any, being a hydrogen atom, phenyl group, amino group, guanyl group, nitro group or cyano group.
Claim 10
Dependent Claim
24 words
The electrostatic recording material according to claim 1 in which said guanidine compound is contained in a proportion of 0.1 to 15 weight percent.
Claim 11
Dependent Claim
24 words
The electrostatic recording material according to claim 9 in which said guanidine compound is contained in a proportion of 0.5 to 5 weight percent.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |