Patent US3147134A successfully refreshed from Google Patents.
US3147134A
Expired / Lapsed
US
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Heat-sensitive copy sheet
Assignee: 3M Co
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Filing: 1961-10-12
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Granted: 1964-09-01
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 Bryce L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:45
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/48; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/918; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A HEAT-SENSITIVE COPY SHEET USEFUL IN MAKING HIGHRESOLUTION COPIES OF DIFFERENTIALLY RADIATION-ABSORPTIVE GRAPHIC ORIGINALS BY A THERMOGRAPHIC PROCESS INVOLVING BRIEF INTENSE IRRADIATION OF SAID ORIGINAL WHILE IN HEATCONDUCTIVE CONTACT WITH SAID COPY SHEET AND INCLUDING, IN COMBINATION, A STRATUM OF CHEMICALLY INTER-REACTIVE COMPONENTS IN UNIFORM INTIMATE JUXTAPOSITION IN SUFFICIENT AMOUNT AND IN CONDITION FOR CHEMICALLY REACTING TO FORM A VISIBLY DIFFERENTLY COLORED REACTION PRODUCT ON BRIEFLY HEATING THE COPY SHEET, AND A PARTICULATE OPAQUE HEATTRANSPARENTIZABLE STRATUM ASSOCIATED WITH AND AT LEAST PARTIALLY CONCEALING SAID REACTING STRATUM AND ADAPTED TO BE RENDERED PERMANENTLY TRANSPARENT ON BRIEFLY HEATING THE COPY SHEET.
Claim 2
Dependent Claim
99 words
A HEAT-SENSITIVE COPY SHEET USEFUL IN MAKING HIGHRESOLUTION COPIES OF DIFFERENTIALLY RADIATION-ABSORPTIVE GRAPHIC ORIGINALS BY A THERMOGRAPHIC PROCESS INVOLVING BRIEF INTENSE IRRADIATION OF SAID ORIGINAL WHILE IN HEATCONDUCTIVE CONTACT WITH SAID COPY SHEET AND INCLUDING, IN COMBINATION, A STRATUM OF CHEMICALLY INTER-REACTIVE COMPONENTS IN UNIFORM INTIMATE JUXTAPOSITION IN SUFFICIENT AMOUNT AND IN CONDITION FOR CHEMICALLY REACTING TO FORM A VISIBLY DIFFERENTLY COLORED REACTION PRODUCT ON BRIEFLY HEATING THE COPY SHEET, AND A PARTICULATE OPAQUE HEATTRANSPARENTIZABLE STRATUM ASSOCIATED WITH AND AT LEAST PARTIALLY CONCEALING SAID REACTING STRATUM AND ADAPTED TO BE RENDERED PERMANENTLY TRANSPARENT ON BRIEFLY HEATING THE COPY SHEET.
References Cited (Backward Citations)
US2519660A
Cited
US2807545A
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US2730457A
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US2940866A
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US2967784A
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US3057999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |