Patent US3574674A successfully refreshed from Google Patents.
US3574674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy sheet for use in reproduction of images from printed surfaces
Assignee: US Plywood Champion Papers Inc
•
Filing: 1967-05-01
•
Granted: 1971-04-13
•
Expires: 1987-05-01
Abstract
Abstract A COPY SHEET FOR REPRODUCING AN ORIGINAL PRINTED SHEET BY MOISTURE DIFFUSION IN THE ABSENCE OF SPECIAL HEAT, LIGHT AND ELECTRICITY. THE COPY SHEET HAVING AN IMPERMEABLE TRANSPARENT BASE AND A MOISTURE PERMEABLE, COLORED SURFACE LAYER WHICH WHEN MOISTENED AND APPLIED TO THE PRINTED SHEET FOR SEVERAL SECONDS REPRODUCES THE PRINTED IMAGE ON THE COPY SHEET IS CONTRASTINGLY VISIBLE COLOR, READABLE FROM ITS TRANSPARENT BASE SIDE. THE COPY SHEET BEING PRODUCED BY FORMING A MOISTURE PERMEABLE, THERMOPLASTIC SURFACE LAYER CONTAINING A COMBINED DYE OR PIGMENT ON A TRANSPARENT IMPERMEABLE BASE SHEET.
Inventors
- 👤 William P Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:31
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |