Patent US3674535A successfully refreshed from Google Patents.
US3674535A
Expired / Lapsed
US
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Heat-sensitive record material
Assignee: Appvion LLC
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Filing: 1970-07-15
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Granted: 1972-07-04
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Expires: 1990-07-15
Abstract
Abstract A HEAT SENSITIVE RECORD MATERIAL WHICH COMPRISES (1) A BASE SHEET SUCH AS PAPER, AND (2) A COATING OF A COLORLESS CHROMOGENIC MATERIAL AND A BISPHENOL DISTRIBUTED IN A POLYVINYL ALCOHOL IN COMBINATION WITH A FILLER SUCH AS CLAY, A LUBRICANT SUCH AS ZINC STEARATE AND A NONTACKY WAX. CONVENTIONAL WETTING AGENTS AND DEFOAMERS ALSO ARE PRESENT IN THE RECORD MATERIAL. THIS MATERIAL IS RESISTANT TO PICK-OFF OF THE RECORD SHEET SURFACE AND FREEZESTICKING OF THE RECORD SHEET TO THE PRINTING HEAD WHEN THE RECORD MEATERIAL IS USED IN CONJUNCTION WITH A RAPIDLY HEATED AND COOLED PRINTING HEAD.
Inventors
- 👤 James H Blose
- 👤 Shashikant G Talvalkar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:18
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375; B41M5/333; B41M5/3338; Y; Y10; Y10S; Y10S428/00; Y10S428/913
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |