US2995465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy-sheet
Assignee: 3M Co
•
Filing: 1959-08-07
•
Granted: 1961-08-08
•
Expires: 1979-08-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Gilbert T Richey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; C; C10; C10M; C10M2201/00; C10M2201/02; C10M2201/08; C10M2201/082; C10M2201/083; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/107; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2219/00; C10M2219/02; C10M2219/024; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A HEAT-SENSITIVE COPY-SHEET ADAPTED FOR MAKING CLEAR AND SHARP REPRODUCTIONS OF GRAPHIC ORIGINALS BY A THERMOGRAPHIC PROCESS INVOLVING BRIEF APPLICATION OF A HEATPATTERN CORRESPONDING TO SAID ORIGINAL, SAID COPY-SHEET BEING STABLE UNDER NORMAL HANDLING AND USE CONDITIONS AND BEING RAPIDLY PERMANENTLY VISIBLY CHANGED ON MOMENTARY CONTACT WITH A METAL TEST BAR AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 90-150*C., SAID COPY-SHEET INCLUDING A THIN VISIBLY HEAT-SENSITIVE LAYER CONTAINING, IN INTIMATE ASSOCIATION, REACTANTS CONSISTING OF AZO COUPLING COMPONENT AND SOLID, LIGHT-STABLE, NON-HYGROSCOPIC TRIAZENE SUBSTANTIALLY NON-VOLATILE AT TEMPERATURES UP TO ABOUT 150*C. AND HAVING THE FORMULA
Claim 2
Dependent Claim
95 words
A HEAT-SENSITIVE COPY-SHEET ADAPTED FOR MAKING CLEAR AND SHARP REPRODUCTIONS OF GRAPHIC ORIGINALS BY A THERMOGRAPHIC PROCESS INVOLVING BRIEF APPLICATION OF A HEATPATTERN CORRESPONDING TO SAID ORIGINAL, SAID COPY-SHEET BEING STABLE UNDER NORMAL HANDLING AND USE CONDITIONS AND BEING RAPIDLY PERMANENTLY VISIBLY CHANGED ON MOMENTARY CONTACT WITH A METAL TEST BAR AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 90-150*C., SAID COPY-SHEET INCLUDING A THIN VISIBLY HEAT-SENSITIVE LAYER CONTAINING, IN INTIMATE ASSOCIATION, REACTANTS CONSISTING OF AZO COUPLING COMPONENT AND SOLID, LIGHT-STABLE, NON-HYGROSCOPIC TRIAZENE SUBSTANTIALLY NON-VOLATILE AT TEMPERATURES UP TO ABOUT 150*C. AND HAVING THE FORMULA
References Cited (Backward Citations)
US2748024A
Cited
US2663656A
Cited
US2663655A
Cited
US2873668A
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US2838994A
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US2899334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |