US3219993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image formation and display utilizing a thermotropically color reversible material
Assignee: Xerox Corp
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Filing: 1962-10-24
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Granted: 1965-11-23
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Expires: 1982-10-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Schwertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:58
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/28; B41M5/282; G; G01; G01S; G01S1/00; G01S1/02; G09; G09G; G09G3/00; G09G3/20; G09G3/34; H; H10; H10N; H10N10/00; G09G2300/00; G09G2300/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A RECORDING AND DISPLAY DEVICE COMPRISING A LAYR OF A THERMOTROPICALLY COLOR-REVERSIBLE MATERIAL HAVING A FIXED COLOR HYSTERSIS LOOP WHICH BRACKETS AMBIENT TEMPERATURE, CONTIGUOUS TO AT LEAST ONE PELTIER JUNCTION CAPABLE OF HEATING AND COOLING SURROUNDING MATERIAL BEYOND THE LIMITS OF SAID LOOP, MEANS TO APPLY AN ELECTRICAL POTENTIAL ACROSS SAID PELTIER JUNCTION AND MEANS TO REVERSE THE POLARITY OF SAID APPLIED POTENTIAL.
Claim 2
Dependent Claim
63 words
A RECORDING AND DISPLAY DEVICE COMPRISING A LAYR OF A THERMOTROPICALLY COLOR-REVERSIBLE MATERIAL HAVING A FIXED COLOR HYSTERSIS LOOP WHICH BRACKETS AMBIENT TEMPERATURE, CONTIGUOUS TO AT LEAST ONE PELTIER JUNCTION CAPABLE OF HEATING AND COOLING SURROUNDING MATERIAL BEYOND THE LIMITS OF SAID LOOP, MEANS TO APPLY AN ELECTRICAL POTENTIAL ACROSS SAID PELTIER JUNCTION AND MEANS TO REVERSE THE POLARITY OF SAID APPLIED POTENTIAL.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |