US3080254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive copying-paper
Assignee: 3M Co
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Filing: 1959-10-26
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Granted: 1963-03-05
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Expires: 1979-10-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin A Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/4989; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/165; Y10S430/166; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A HEAT-SENSITIVE CHEMICALLY REACTIVE COPY-SHEET SUITABLE FOR THE PREPARATION FROM DIFFERENTLY RADIATIONABSORPTIVE GRAPHIC ORIGINALS OF THERMOGRAPHIC REPRODUCTIONS HAVING DARK-COLORED IMAGE AREAS OF PLEASING APPEARANCE, SAID COPY-SHEET COMPRISING A THIN FLEXIBLE CARRIER WEB COATED WITH A VISIBLY HEAT-SENSITIVE COATING COMPRISING (1) A FILM-FORMING BINDER, (2) A NOBLE METAL SALT OF AN ORGANIC ACID, AND (3) A CYCLIC ORGANIC REDUCING AGENT FOR THE NOBLE METAL IRONS, HAVING AN ACTIVE HYDROGEN ATOM ATTACHED TO AN ATOM WHICH IS SELECTED FROM THE CLASS OF OXYGEN, NITROGEN AND CARBON ATOMS AND IS DIRECTLY ATTACHED TO AN ATOM OF THE CYCLIC RING, AND ADDITIONALLY INCLUDING (4) A SIGNIFICANT SMALL PROPORTION, SUFFICIENT TO CAUSE OBSERVABLE DARKENING OF THE THERMOGRAPHIC IMAGE OF PHTHALAZINONE.
Claim 2
Dependent Claim
115 words
A HEAT-SENSITIVE CHEMICALLY REACTIVE COPY-SHEET SUITABLE FOR THE PREPARATION FROM DIFFERENTLY RADIATIONABSORPTIVE GRAPHIC ORIGINALS OF THERMOGRAPHIC REPRODUCTIONS HAVING DARK-COLORED IMAGE AREAS OF PLEASING APPEARANCE, SAID COPY-SHEET COMPRISING A THIN FLEXIBLE CARRIER WEB COATED WITH A VISIBLY HEAT-SENSITIVE COATING COMPRISING (1) A FILM-FORMING BINDER, (2) A NOBLE METAL SALT OF AN ORGANIC ACID, AND (3) A CYCLIC ORGANIC REDUCING AGENT FOR THE NOBLE METAL IRONS, HAVING AN ACTIVE HYDROGEN ATOM ATTACHED TO AN ATOM WHICH IS SELECTED FROM THE CLASS OF OXYGEN, NITROGEN AND CARBON ATOMS AND IS DIRECTLY ATTACHED TO AN ATOM OF THE CYCLIC RING, AND ADDITIONALLY INCLUDING (4) A SIGNIFICANT SMALL PROPORTION, SUFFICIENT TO CAUSE OBSERVABLE DARKENING OF THE THERMOGRAPHIC IMAGE OF PHTHALAZINONE.
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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |