US3620160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive stencil paper
Assignee: Ricoh Co Ltd
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Filing: 1968-09-18
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Granted: 1971-11-16
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Expires: 1988-09-18
Abstract
Abstract A heat-sensitive stencil paper for use in mimeographic printing, comprising a resinous film consisting of a vinylidene chloride-vinyl chloride copolymer which has a biaxial heat shrinking coefficient in the range of the order of 2-8% at 100 degree C. for 1 minute, said resinous film being lined with a porous thin sheet of paper, said stencil paper being so adapted that an image consisting of perforations in formed in said film by applying infrared light thereto.
Inventors
- 👤 Keishi Kubo
- 👤 Kiyoshi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/24; B41N1/245; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965; Y10T428/249987; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |