US3028254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized chemically reactive heatsensitive copy-sheet
Assignee: 3M Co
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Filing: 1959-09-21
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Granted: 1962-04-03
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Expires: 1979-09-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin A Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/4989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A STABILIZED CHEMICALLY REACTIVE HEAT-SENSITIVE COPYSHEET WHICH REMAINS VISIBLY HEAT-SENSITIVE AND DOES NOT OBSERVABLY DISCOLOR ON PROLONGED EXPOSURE TO SUNLIGHT SAID COPY-SHEET INCLUDING A HEAT-SENTIVE LAYER COMPRISING A NORMALLY VISIBLY STABLE CHEMICALLY REACTIVE HEATSENSITIVE MIXTURE OF AN ORGANIC ACID SOAP OF A NOBLE METAL AND AN ORGANIC REDUCING AGENT FOR THE NOBLE METAL IONS, AND A SIGNIFICIENT SMALL PROPORTION OF A STABILIZER COMPONENT HAVING AN ACTIVATED ETHYLENE IMINE RADICAL BONDED TO AN ELECTRON-WITHDRAWING GROUP OF THE CLASS CONSISTING OF ACYL AND OXYACYL GROUPS, SAID RADICAL HAVING THE STRUCTURE
Claim 2
Dependent Claim
88 words
A STABILIZED CHEMICALLY REACTIVE HEAT-SENSITIVE COPYSHEET WHICH REMAINS VISIBLY HEAT-SENSITIVE AND DOES NOT OBSERVABLY DISCOLOR ON PROLONGED EXPOSURE TO SUNLIGHT SAID COPY-SHEET INCLUDING A HEAT-SENTIVE LAYER COMPRISING A NORMALLY VISIBLY STABLE CHEMICALLY REACTIVE HEATSENSITIVE MIXTURE OF AN ORGANIC ACID SOAP OF A NOBLE METAL AND AN ORGANIC REDUCING AGENT FOR THE NOBLE METAL IONS, AND A SIGNIFICIENT SMALL PROPORTION OF A STABILIZER COMPONENT HAVING AN ACTIVATED ETHYLENE IMINE RADICAL BONDED TO AN ELECTRON-WITHDRAWING GROUP OF THE CLASS CONSISTING OF ACYL AND OXYACYL GROUPS, SAID RADICAL HAVING THE STRUCTURE
References Cited (Backward Citations)
US2663654A
Cited
US2910377A
Cited
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 |