US3180752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive copying sheets
Assignee: Interchemical Corp
•
Filing: 1961-11-06
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Granted: 1965-04-27
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Expires: 1981-11-06
Abstract
No abstract record available.
Inventors
- 👤 Albert E Bollinger
- 👤 Jerome M Delaney
- 👤 John F Mchugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:03
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/36; B41M5/366; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/918; Y10S430/00; Y10S430/165; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A HEAT-SENSITIVE COPYING SHEET COMPRISING AN INFRARED TRANSMITTING NON-METALLIC SUPPORTING BASE AND A VISIBLY OPAQUE, INFRARED TRANSPARENT BLUSHED COATING THEREON OF CONTRASTING COLOR WHICH TRANSPARENTISES WHEN HEATED, SAID COATING COMPRISING A MAJOR AMOUNT OF A SOLID THERMOPLASTIC POLYMER OF METHYL METHACRYLATE HAVING A MELTING POINT ABOUT 125%C. AND A MINOR AMOUNT OF BUTYL STEARATE.
Claim 2
Dependent Claim
54 words
A HEAT-SENSITIVE COPYING SHEET COMPRISING AN INFRARED TRANSMITTING NON-METALLIC SUPPORTING BASE AND A VISIBLY OPAQUE, INFRARED TRANSPARENT BLUSHED COATING THEREON OF CONTRASTING COLOR WHICH TRANSPARENTISES WHEN HEATED, SAID COATING COMPRISING A MAJOR AMOUNT OF A SOLID THERMOPLASTIC POLYMER OF METHYL METHACRYLATE HAVING A MELTING POINT ABOUT 125%C. AND A MINOR AMOUNT OF BUTYL STEARATE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |