Patent US3917481A successfully refreshed from Google Patents.
US3917481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal compositions between electrodes, one of which is a photoconductor
Assignee: Xerox Corp
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Filing: 1974-02-14
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Granted: 1975-11-04
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Expires: 1994-02-14
Abstract
Abstract Liquid crystalline compositions having the optical properties of the cholesteric mesophase are disclosed. The compositions comprise at least one nematic liquid crystalline material and at least one potentially cholesteric material which has a molecular structure which is similar to that of a nematic liquid crystal. Uses of the novel compositions are also described.
Inventors
- 👤 Franklin D Saeva
- 👤 Richard L Schank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:25
CPC Classifications
C; C07; C07C; C07C291/00; C07C291/02; C07C291/08; C09; C09K; C09K19/00; C09K19/04; C09K19/42; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN IMAGING METHOD COMPRISING THE STEPS OF A. PROVIDING AN IMAGING MEMBER COMPRISING A LAYER OF LIQUID CRYSTALLINE COMPOSITION HAVING THE OPTICAL PROPERTIES OF THE CHOLESTERIC LIQUID CRYSTALLINE MESOPHASE ARRANGED BETWEEN A PAIR OF ELECTRODES WHEREIN AT LEAST ONE OF SAID ELECTRODES INCLUDES A PHOTOCONDUCTIVE INSULATING SURFACE ADJACENT SAID LIQUID CRYSTAL LAYER AND AT LEAST ONE OF SAID ELECTRODES IS SUBSTANTIALLY TRANSPARENT, SAID COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST ONE NEMATIC LIQUID CRYSTALLINE MATERIAL AND AT LEAST ONE NON-MESOMORPHIC OPTICALLY ACTIVE MATERIAL WHICH IS REPRESENTED BY A GENERAL FORMULA SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
95 words
AN IMAGING METHOD COMPRISING THE STEPS OF A. PROVIDING AN IMAGING MEMBER COMPRISING A LAYER OF LIQUID CRYSTALLINE COMPOSITION HAVING THE OPTICAL PROPERTIES OF THE CHOLESTERIC LIQUID CRYSTALLINE MESOPHASE ARRANGED BETWEEN A PAIR OF ELECTRODES WHEREIN AT LEAST ONE OF SAID ELECTRODES INCLUDES A PHOTOCONDUCTIVE INSULATING SURFACE ADJACENT SAID LIQUID CRYSTAL LAYER AND AT LEAST ONE OF SAID ELECTRODES IS SUBSTANTIALLY TRANSPARENT, SAID COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST ONE NEMATIC LIQUID CRYSTALLINE MATERIAL AND AT LEAST ONE NON-MESOMORPHIC OPTICALLY ACTIVE MATERIAL WHICH IS REPRESENTED BY A GENERAL FORMULA SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
US3804618A
Cited
US3795517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |