Patent US3028255A successfully refreshed from Google Patents.
US3028255A
Expired / Lapsed
US
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Heat-sensitive copy-sheet
Assignee: 3M Co
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Filing: 1959-10-26
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Granted: 1962-04-03
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Expires: 1979-10-26
Abstract
No abstract record available.
Inventors
- 👤 Owen Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/4989; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A NORMALLY STABLE HEAT-SENSITIVE COPY-SHEET SUITABLE FOR THE THERMOGRAPHIC REPONDUCTION OF DIFFERENTIALLY RADIATION-ABSORPTIVE GRAPHIC ORIGINALS AND INCLUDING A VISIBLY HEAT-SENSITIVE LAYER CAPABLE OF UNDERGOING PEDRMANENT VISIBLE CHANGE ON BRIEF CONTACT OF SAID COPY-SHEET WITH A METAL TEST BAR AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE OF 70*C. TO 150*C. AND COMPRISING AN ORGANIC AMINE MOLYBDATE AND A REDUCING AGENT REACTIVE THEREWITH.
Claim 2
Dependent Claim
61 words
A NORMALLY STABLE HEAT-SENSITIVE COPY-SHEET SUITABLE FOR THE THERMOGRAPHIC REPONDUCTION OF DIFFERENTIALLY RADIATION-ABSORPTIVE GRAPHIC ORIGINALS AND INCLUDING A VISIBLY HEAT-SENSITIVE LAYER CAPABLE OF UNDERGOING PEDRMANENT VISIBLE CHANGE ON BRIEF CONTACT OF SAID COPY-SHEET WITH A METAL TEST BAR AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE OF 70*C. TO 150*C. AND COMPRISING AN ORGANIC AMINE MOLYBDATE AND A REDUCING AGENT REACTIVE THEREWITH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |