Patent US3789425A successfully refreshed from Google Patents.
US3789425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-sensitive recording medium having a plurality of recording layers
Assignee: Colorfax Co Ltd
•
Filing: 1972-06-09
•
Granted: 1974-01-29
•
Expires: 1992-06-09
Abstract
Abstract An electro-sensitive recording medium comprising a base layer, a plurality of laminated recording layers formed on one surface of said base layer, said recording layers each being comprised of a colored layer having a relatively great resistance value and an electro-conductive layer provided on this colored layer.
Inventors
- 👤 H Matsushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:44
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/24; B41M5/245
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
An electro-sensitive recording medium comprising: a base layer and a plurality of recording layers formed one upon another on at least one surface of said base layer; said recording layers each being comprised of: a. a colored layer different in color for each colored layer and having a relatively great resistance value and; b. a thin electro-conductive layer provided on each colored layer; a part of each of the electro-conductive layers excepting the uppermost electro-conductive layer extending beyond that electro-conductive layer positioned immediately thereabove, and the surface of said uppermost electro-conductive layer and the surfaces of said extended portions of the other electro-conductive layers being covered by a cover layer.
Claim 2
Dependent Claim
17 words
An electro-sensitive recording medium according to claim 2, in which said base layer is a paper sheet.
Claim 3
Dependent Claim
17 words
An electro-sensitive recording medium according to claim 2, in which said base layer is a plastic sheet.
Claim 4
Dependent Claim
23 words
An electro-sensitive recording medium according to claim 2, in which said base layer is comprised of a paper sheet and a plastic sheet.
Claim 5
Dependent Claim
25 words
An electro-sensitive recording medium according to claim 2, in which the surface of the recording layer positioned topmost is covered with a semi-conductive cover layer.
Claim 6
Dependent Claim
19 words
An electro-sensitive recording medium according to claim 6, in which a part of said cover layer is cut off.
Claim 7
Dependent Claim
26 words
An electro-sensitive recording medium according to claim 2, in which a part of the surface of each of said electro-conductive layers is exposed to the atmosphere.
Claim 8
Dependent Claim
96 words
An electro-sensitive recording medium comprising: a base layer and a plurality of recording layers formed one upon another on at least one surface of said base layer, said recording layers each being comprised of a. a colored layer different in color for each colored layer and having a relatively great resistance value; and b. a thin electro-conductive layer provided for each colored layer, the respective electro-conductive layers being electrically connected to each other, forming a junction; and the surface of said uppermost recording layer and the surface of said junction being covered by a semi-conductive layer.
Claim 9
Dependent Claim
23 words
An electro-sensitive recording medium according to claim 9, in which said cover layer is partly cut off at a position above said junction.
References Cited (Backward Citations)
US3263604A
Cited
US3434878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |