Patent US2813043A successfully refreshed from Google Patents.
US2813043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive copying-paper
Assignee: 3M Co
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Filing: 1955-03-28
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Granted: 1957-11-12
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Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Bryce L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:00
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/426; B41M5/44; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A STABLE, MOISTURE-RESISTANT, HEAT-SENSITIVE COPYINGPAPER CAPABLE OF PROVIDING HIGH-CONTRAST COPIES OF GRAPHIC SUBJECTED-MATTER BY THERMOGRAPHIC COPYING PROCESSES AS HEREIN DESCRIBED, CONSISTING OF A THIN, TRANSPARENT, FLEXIBLE BACKING, AN INTERMEDIATE CHEMICALLY REACTIVE, VISIBLY HEATSENSITIVE COATING, THE CHEMICALLY REACTION OCCURING WITHIN SAID COATING ON HEATING SAID SHEET BEING RESPONSIBLE FOR THE VISIBLE CHANGE, AND A VISIBLY OPAQUE PROTECTIVE SURFACE COATING PROVIDING STRONG CONTRAST FOR VISIBLE COPY PRODUCED IN SAID INTERMEDIATE COATING.
Claim 2
Dependent Claim
69 words
A STABLE, MOISTURE-RESISTANT, HEAT-SENSITIVE COPYINGPAPER CAPABLE OF PROVIDING HIGH-CONTRAST COPIES OF GRAPHIC SUBJECTED-MATTER BY THERMOGRAPHIC COPYING PROCESSES AS HEREIN DESCRIBED, CONSISTING OF A THIN, TRANSPARENT, FLEXIBLE BACKING, AN INTERMEDIATE CHEMICALLY REACTIVE, VISIBLY HEATSENSITIVE COATING, THE CHEMICALLY REACTION OCCURING WITHIN SAID COATING ON HEATING SAID SHEET BEING RESPONSIBLE FOR THE VISIBLE CHANGE, AND A VISIBLY OPAQUE PROTECTIVE SURFACE COATING PROVIDING STRONG CONTRAST FOR VISIBLE COPY PRODUCED IN SAID INTERMEDIATE COATING.
References Cited (Backward Citations)
US2710263A
Cited
US2663657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |