US2668126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive copying-paper
Assignee: 3M Co
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Filing: 1950-01-05
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Granted: 1954-02-02
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Expires: 1970-01-05
Abstract
No abstract record available.
Inventors
- 👤 Nelson W Taylor
- 👤 Bryce L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:44
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/918; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24926; Y10T428/24934; Y10T428/25; Y10T428/252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A LIGHT-STABLE, HEAT-SENSITIVE COPYING-PAPER ADAPTED TO PROVIDE CLEAR AND SHARP COPIES OF TYPEWRITTEN MESSAGES BY METHODS HEREIN DESCRIBED, COMPRISING A THIN FLEXIBLE VISIBLY CONTRASTING SUPPORT MEMBER HAVING LOW HEAT CONDUCTIVITY AND A THIN OPAQUE HEAT-TRANSPARENTIZABLE SURFACE COATING COMPRISING A MIXTURE OF: (A) ONE HUNDRED PARTS BY WEIGHT OF PARTICLES OF TRANSPARENT WAXY MATERIAL FUSIBLE AT ABOUT 60-150* C.; (B) ABOUT 10-100 PARTS BY WEIGHT OF TRANSPARENT INFUSIBLE SILICEOUS PARTICLES LESS THAN ABOUT FOUR MILS IN DIAMETER; AND (C) SUFFICIENT TRANSPARENT FLEXIBLE ORGNAIC FILM-FORMING BINDER, WITHIN THE RANGE OF ABOUT ONE TO ABOUT SIX PARTS BY WEIGHT, TO PROVIDE GOOD RESISTANCE TO DUSTING AND RUB-OFF OF THE COATING WITHOUT CAUSING FLAKIUNG THEREOF; THE WAX, SILICEOUS PARTICLES, AND BINDER EACH HAVING SUBSTANTIALLY THE SAME REFRACTIVE INDEX, AND SAID BINDER BEING INFUSIBLE AT THE FUSION TEMPERATURE OF SAID WAX.
Claim 2
Dependent Claim
136 words
A LIGHT-STABLE, HEAT-SENSITIVE COPYING-PAPER ADAPTED TO PROVIDE CLEAR AND SHARP COPIES OF TYPEWRITTEN MESSAGES BY METHODS HEREIN DESCRIBED, COMPRISING A THIN FLEXIBLE VISIBLY CONTRASTING SUPPORT MEMBER HAVING LOW HEAT CONDUCTIVITY AND A THIN OPAQUE HEAT-TRANSPARENTIZABLE SURFACE COATING COMPRISING A MIXTURE OF: (A) ONE HUNDRED PARTS BY WEIGHT OF PARTICLES OF TRANSPARENT WAXY MATERIAL FUSIBLE AT ABOUT 60-150* C.; (B) ABOUT 10-100 PARTS BY WEIGHT OF TRANSPARENT INFUSIBLE SILICEOUS PARTICLES LESS THAN ABOUT FOUR MILS IN DIAMETER; AND (C) SUFFICIENT TRANSPARENT FLEXIBLE ORGNAIC FILM-FORMING BINDER, WITHIN THE RANGE OF ABOUT ONE TO ABOUT SIX PARTS BY WEIGHT, TO PROVIDE GOOD RESISTANCE TO DUSTING AND RUB-OFF OF THE COATING WITHOUT CAUSING FLAKIUNG THEREOF; THE WAX, SILICEOUS PARTICLES, AND BINDER EACH HAVING SUBSTANTIALLY THE SAME REFRACTIVE INDEX, AND SAID BINDER BEING INFUSIBLE AT THE FUSION TEMPERATURE OF SAID WAX.
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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |