Patent US3711713A successfully refreshed from Google Patents.
US3711713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically controlled thermal imaging system using a cholesteric to nematic phase transition
Assignee: Xerox Corp
•
Filing: 1971-08-05
•
Granted: 1973-01-16
•
Expires: 1991-08-05
Abstract
Abstract A system transforming an optically negative liquid crystalline substance to an optically positive liquid crystalline mesophase by an applied electrical field, and an imaging system wherein the electrical field-induced transition images a liquid crystalline member.
Inventors
- 👤 W Haas
- 👤 J Becker
- 👤 R Madrid
- 👤 J Wysocki
- 👤 J Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/13731
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
The method of claim 1 wherein the imaging member is viewed with means for enhancing contrast between image and background areas.
Claim 2
Dependent Claim
13 words
The method of claim 1 wherein the imaging member is viewed between polarizers.
References Cited (Backward Citations)
US3627408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |