US3804618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal imaging system
Assignee: Xerox Corp
•
Filing: 1967-06-16
•
Granted: 1974-04-16
•
Expires: 1987-06-16
Abstract
Abstract An imaging system wherein a liquid crystal composition is placed in an imagewise field. Molecular orientation within the liquid crystal in areas of field provides a visible image.
Inventors
- 👤 E Forest
- 👤 C Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:42
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G13/00; G03G13/22; G03G13/24
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
18 words
The process of claim 1 wherein said imaging composition comprises a mixture of cholesteryl benzoate and cholesteryl acetate.
Claim 2
Dependent Claim
18 words
The process of claim 1 wherein said imaging composition comprises a mixture of cholesteryl oleate and cholesteryl crotonate.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said imaging compositIon comprises a mixture of cholesteryl myristate and cholesteryl butyrate.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein said composition comprises a mixture of cholesteric liquid crystalline material and nematic liquid crystalline material.
Claim 5
Dependent Claim
97 words
The imaging process of claim 1 comprising the steps of: a. providing a pair of conductive electrode members in spaced relationship at least one of said members being sufficiently transparent to transmit a change in the appearance of an imaging composition placed between said members; b. placing between said members an imaging composition comprising a material having a cholesteric liquid crystalline phase; and c. applying an electrical field between said conductive electrode members while said material is in the cholesteric liquid crystalline phase to cause a change in the appearance of said composition in an imagewise configuration.
Claim 6
Dependent Claim
25 words
The process of claim 6 wherein at least one of said conductive members has an insulating material in image configuration on at least its surface.
Claim 7
Dependent Claim
24 words
The process of claim 6 wherein there is additionally a gasket of substantially electrically insulating material containing the imaging composition between the conductive members.
Claim 8
Dependent Claim
20 words
The process of claim 6 wherein at least one of said conductive electrode members is shaped in an image configuration.
Claim 9
Dependent Claim
27 words
The process of claim 9 wherein there is additionally a substantially electrically insulating layer between the conductive mmember in image configuration and the layer of imaging composition.
Claim 10
Dependent Claim
41 words
The process of claim 1 comprising: providing a surface of a photoconductive member having an electrostatic latent image thereon; and providing a layer of an imaging composition comprising a material having a cholesteric liquid crystalline phase, on or adjacent said surface.
Claim 11
Dependent Claim
20 words
The process of claim 11 wherein a substantially insulating layer is present between the photoconductive member and the imaging composition.
Claim 12
Dependent Claim
12 words
The process of claim 11 wherein the photoconductive member comprises vitreous selenium.
Claim 13
Dependent Claim
11 words
The process of claim 11 wherein the photoconductive member comprises phthalocyanine.
Claim 14
Dependent Claim
15 words
The process of claim 11 wherein the photoconductive member comprises phthalocyanine dispersed in a binder.
Claim 15
Dependent Claim
16 words
The process of claim 11 wherein the photoconductive member comprises zinc oxide dispersed in a binder.
Claim 16
Dependent Claim
21 words
The process of claim 11 wherein said composition comprises a mixture of cholesteric liquid crystalline material and nematic liquid crystalline material.
References Cited (Backward Citations)
US3167607A
Cited
US3322485A
Cited
US3484162A
Cited
US3410999A
Cited
US3627408A
Cited
FR1484584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |