US3753841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure recording sheet
Assignee: TECHNOGRAPHICS FITCHBURG COATED PRODUCTS Inc A MA CORP
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Filing: 1972-05-09
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Granted: 1973-08-21
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Expires: 1992-05-09
Abstract
Abstract Stock comprising a pressure recording sheet including a protective transparent overlay sheet, an opaque pressure clarifiable coating under said overlay sheet, and a base sheet adhesively secured to the blush coat. The adhesive for securing the base sheet to the overlay sheet is of a color contrasting with the color of opaque coat so that in response to localized pressure on the overlay sheet, the opaque coat transparentizes and reveals the contrastingly colored adhesive to produce a record.
Inventors
- 👤 S Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:01
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; Y; Y10; Y10S; Y10S428/00; Y10S428/918; Y10T; Y10T428/00; Y10T428/14; Y10T428/1467
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA552744A
Cited
US2505475A
Cited
US2648924A
Cited
US2898112A
Cited
US2939802A
Cited
US3441948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |