US3185584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat responsive marking sheets
Assignee: Nashua Corp
•
Filing: 1962-11-19
•
Granted: 1965-05-25
•
Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 Michael F Baumann
- 👤 William R Lawton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:32
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A HEAT-RESPONSIVE COPY SHEET ADAPTED TO CHANGE VISIBILY TO A CONTRASTING COLOR WHEREVER SUBJECTED TO LOCALIZED HEATING TO A TEMPERATURE BETWEEN 50* AND 150*C., COMPRISING, IN COMBINATION (A) A SUPPORTING SHEET CARRYING ON A SURFACE THEREOF A COATING COMPRISING A UNIFORMLY DISTRUBTED INITMATE ASSOCIATION OF FINELY DIVIDED PARTICLES OF (B) AN OXIDIZABLE COMPOUND SELECTED FROM THE CLASS CONSISTING OF PHENOLS AND NITROPHENOLS, (C) AN OXIDANT SELECTED FROM THE CLASS CONSISTING OF THE NITROPRUSSIDES OF COPPER, NICKEL AND SODIUM, COPPER OXALATE, POTASSIUM FERRICYANIDE, CERIC SULFATE, AND CERIC AMMONIUM SULFATE, AND (D) A SOLID, NORMALLY STABLE, CO-CRYSTAL ADDUCT COMPRISING THE REACTION PRODUCT OF AN AMINE AND AN HYDROXYPHENOL COMPOUND SELECTED FROM THE CLASS
Claim 2
Dependent Claim
111 words
A HEAT-RESPONSIVE COPY SHEET ADAPTED TO CHANGE VISIBILY TO A CONTRASTING COLOR WHEREVER SUBJECTED TO LOCALIZED HEATING TO A TEMPERATURE BETWEEN 50* AND 150*C., COMPRISING, IN COMBINATION (A) A SUPPORTING SHEET CARRYING ON A SURFACE THEREOF A COATING COMPRISING A UNIFORMLY DISTRUBTED INITMATE ASSOCIATION OF FINELY DIVIDED PARTICLES OF (B) AN OXIDIZABLE COMPOUND SELECTED FROM THE CLASS CONSISTING OF PHENOLS AND NITROPHENOLS, (C) AN OXIDANT SELECTED FROM THE CLASS CONSISTING OF THE NITROPRUSSIDES OF COPPER, NICKEL AND SODIUM, COPPER OXALATE, POTASSIUM FERRICYANIDE, CERIC SULFATE, AND CERIC AMMONIUM SULFATE, AND (D) A SOLID, NORMALLY STABLE, CO-CRYSTAL ADDUCT COMPRISING THE REACTION PRODUCT OF AN AMINE AND AN HYDROXYPHENOL COMPOUND SELECTED FROM THE CLASS
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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |