US3157526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermo-sensitive copy sheet and method of making
Assignee: Bemis Brothers Bag Co
•
Filing: 1962-04-17
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Granted: 1964-11-17
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Expires: 1982-04-17
Abstract
No abstract record available.
Inventors
- 👤 Ronald B Johnson
- 👤 Duane H Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:37
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A THERMO-SENSITIE COPYING SHEET FOR THE REPRODUCTION OF GRAPHIC IMAGES WHICH COMPRISES A BASE MATERIAL IN SHEET FORM CARRYING THERON A HEAT SENSITIVE MATERIAL COMPRISING A UNIFORMLY DISPERSED MIXTURE OF AT LEAST ONE ZINC SALT SELECTED FROM THE CLASS CONSISTING OF ZINC LOWER ALKYL DI-SUBSTITUTED DI-THIOCARBAMATES, THE SUBSTITUTED RADICALS OF WHICH HAVE FROM ONE TO FIVE CARBON ATOMS, AND ZINC ARYL DI-SUBSTITUTED DI-THIOCARBAMATES, AND AT LEAST ONE HEAVY METAL SALT OF A HIGHER FATTY ACID WHICH IS NON-REACTIVE WITH SAID ZINC SALT AT NORAML ROOM AND STORAGE TEMPERATURE AND IS REACTIVE THEREWITH AT TEMPERATURES ABOVE THE MELTING POINT OF SAID ZINC SALT TO PRODUCE A COLOR CHANGE.
Claim 2
Dependent Claim
107 words
A THERMO-SENSITIE COPYING SHEET FOR THE REPRODUCTION OF GRAPHIC IMAGES WHICH COMPRISES A BASE MATERIAL IN SHEET FORM CARRYING THERON A HEAT SENSITIVE MATERIAL COMPRISING A UNIFORMLY DISPERSED MIXTURE OF AT LEAST ONE ZINC SALT SELECTED FROM THE CLASS CONSISTING OF ZINC LOWER ALKYL DI-SUBSTITUTED DI-THIOCARBAMATES, THE SUBSTITUTED RADICALS OF WHICH HAVE FROM ONE TO FIVE CARBON ATOMS, AND ZINC ARYL DI-SUBSTITUTED DI-THIOCARBAMATES, AND AT LEAST ONE HEAVY METAL SALT OF A HIGHER FATTY ACID WHICH IS NON-REACTIVE WITH SAID ZINC SALT AT NORAML ROOM AND STORAGE TEMPERATURE AND IS REACTIVE THEREWITH AT TEMPERATURES ABOVE THE MELTING POINT OF SAID ZINC SALT TO PRODUCE A COLOR CHANGE.
References Cited (Backward Citations)
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US2625494A
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US2663657A
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |