US2813042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a sensitized thermographic copy sheet and resultant sheet
Assignee: AB Dick Co
•
Filing: 1952-10-02
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Granted: 1957-11-12
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Expires: 1972-10-02
Abstract
No abstract record available.
Inventors
- 👤 William E Gordon
- 👤 Samuel E Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:46
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31703
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AN ARTICLE OF MANUFACTURE OF THE TYPE DESCRIBED COMPRISING A NON-CONDUCTIVE, RELATIVELY NON-INFRA RED ABSORBING BASE SHEET SENSITIZED WITH THE COMBINATION OF THIOUREA, A SALT OF A POLYVALENT METAL CAPABLE OF REACTION AT ELEVATED TEMPERATURE TO FORM A COLORED REACTION PRODUCT WITH THIOUREA AND UREA PRESENT IN AMOUNT RANGING FROM EQUAL PARTS BY WEIGHT TO TEN TIMES THE WEIGHT OF THE THIOUREA AND POLYVALENT METAL SALT.
Claim 2
Dependent Claim
66 words
AN ARTICLE OF MANUFACTURE OF THE TYPE DESCRIBED COMPRISING A NON-CONDUCTIVE, RELATIVELY NON-INFRA RED ABSORBING BASE SHEET SENSITIZED WITH THE COMBINATION OF THIOUREA, A SALT OF A POLYVALENT METAL CAPABLE OF REACTION AT ELEVATED TEMPERATURE TO FORM A COLORED REACTION PRODUCT WITH THIOUREA AND UREA PRESENT IN AMOUNT RANGING FROM EQUAL PARTS BY WEIGHT TO TEN TIMES THE WEIGHT OF THE THIOUREA AND POLYVALENT METAL SALT.
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) | 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 |