Patent US3891787A successfully refreshed from Google Patents.
US3891787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording member
Assignee: General Co Ltd
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Filing: 1973-12-03
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Granted: 1975-06-24
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Expires: 1993-12-03
Abstract
Abstract An electrostatic recording member comprises a recording layer composed of a resin film component and an inorganic pigment or a metal soap dispersed therein, at least one member of the resin film component being selected from the group consisting of fatty acid modified epoxy resin ester, cellulose ester, cellulose ether and chlorinated rubber.
Inventors
- 👤 Seizi Ueyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:03
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0211; G03G5/0208; G03G5/0214; G03G5/0217; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/256; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
AN ELECTROSTATIC RECORDING MEMBER WHICH COMPRISES AN ELECTRICALLY LOW RESISTANT SUBSTRATE HAVING A RECORDING LAYER THEREON WHICH CONSISTS ESSENTIALY OF AN INORGANIC PIGMENT OR A METAL SOAP DISPERSED IN A RESIN FILM WHICH IS COMPOSED OF AT LEAST 30% BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN FILM, OF A FATTY ACID MODIFIED EPOXY RESIN ESTER HAVING A DEGREE OF
Claim 2
Dependent Claim
61 words
AN ELECTROSTATIC RECORDING MEMBER WHICH COMPRISES AN ELECTRICALLY LOW RESISTANT SUBSTRATE HAVING A RECORDING LAYER THEREON WHICH CONSISTS ESSENTIALY OF AN INORGANIC PIGMENT OR A METAL SOAP DISPERSED IN A RESIN FILM WHICH IS COMPOSED OF AT LEAST 30% BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN FILM, OF A FATTY ACID MODIFIED EPOXY RESIN ESTER HAVING A DEGREE OF
Claim 3
Dependent Claim
27 words
An electrostatic recording member according to claim 1 in which the inorganic pigment is selected from the group consisting of calcium carbonate, clay, titanium oxide and mica.
Claim 4
Dependent Claim
29 words
An electrostatic recording member according to claim 1 in which the metal soap is selected from the group consisting of barium stearate, calcium stearate, barium palmitate, and calcium palmitate.
Claim 5
Dependent Claim
42 words
An electrostatic recording member according to claim 1 in which the fatty acid modified epoxy resin ester is selected from the group consisting of epoxy resins esterified with a drying oil fatty acid, semidrying oil fatty acid or non-drying oil fatty acid.
Claim 6
Dependent Claim
30 words
An electrostatic recording member according to claim 1, in which the weight ratio of the inorganic pigment or the metal soap to the resin film iS about 1:1 to 1:5.
Claim 7
Dependent Claim
26 words
An electrostatic recording member according to claim 1, in which the surface resistivity of the electrically low resistent substrate is less than about 109 ohm. cm.
Claim 8
Dependent Claim
23 words
An electrostatic recording member according to claim 1, wherein said resin film is composed entirely of said fatty acid modified epoxy resin ester.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |