Patent US3894793A successfully refreshed from Google Patents.
US3894793A
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Liquid crystal imaging system using tributyltin oxide or tributyltin chloride
Assignee: Xerox Corp
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Filing: 1974-10-07
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Granted: 1975-07-15
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Expires: 1994-10-07
Abstract
Abstract Nematic liquid crystalline materials are homeotropically aligned by contact with either tributyltin oxide or tributyltin chloride. Electro-optical lifetime of nematic liquid crystalline materials employed adjacent photoconductive layers are extended by contact with tributyltin oxide.
Inventors
- 👤 Werner E L Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:20
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133703; G02F1/135; G02F1/137; G02F1/13743; G02F1/1375
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
28 words
An electro-optic device, comprising between two electrodes a nematic liquid crystalline composition in contact with a material selected from the group consisting of tributyltin oxide and tributyltin chloride.
Claim 2
Dependent Claim
28 words
An electro-optic device, comprising between two electrodes a nematic liquid crystalline composition in contact with a material selected from the group consisting of tributyltin oxide and tributyltin chloride.
Claim 3
Dependent Claim
21 words
The device according to claim 1 wherein said material selected from said group is uniformly dispersed within said liquid crystalline composition.
Claim 4
Dependent Claim
17 words
The method according to claim 1 wherein said material selected from said group is in layer configuration.
Claim 5
Dependent Claim
15 words
The device according to claim 3 wherein said layer of material is in imagewise configuration.
Claim 6
Dependent Claim
15 words
The device according to claim 1 wherein one of said electrodes is in imagewise configuration.
Claim 7
Dependent Claim
17 words
The device according to claim 1 wherein said nematic liquid crystalline composition is provided in imagewise configuration.
Claim 8
Dependent Claim
24 words
The device according to claim 1 further including between one of said electrodes and said nematic liquid crystalline composition a layer of photoconductive material.
Claim 9
Dependent Claim
13 words
The device according to claim 7 wherein said photoconductive material comprises arsenic triselenide.
Claim 10
Independent Claim
42 words
The method of homeotropically aligning a nematic liquid crystalline composition comprising: a. providing a substrate; and b. providing on said substrate a nematic liquid crystalline composition in contact with a material selected from the group consisting of tributyltin oxide and tributyltin chloride.
Claim 11
Independent Claim
42 words
The method of homeotropically aligning a nematic liquid crystalline composition comprising: a. providing a substrate; and b. providing on said substrate a nematic liquid crystalline composition in contact with a material selected from the group consisting of tributyltin oxide and tributyltin chloride.
Claim 12
Dependent Claim
21 words
The method according to claim 9 wherein said material selected from said group is uniformly dispersed within said liquid crystalline composition.
Claim 13
Dependent Claim
18 words
The method according to claim 9 wherein said material selected from said group is provided in layer configuration.
Claim 14
Dependent Claim
18 words
The method according to claim 11 wherein said material selected from said group is provided in imagewise configuration.
Claim 15
Dependent Claim
17 words
The method according to claim 9 wherein said nematic liquid crystalline composition is provided in imagewise configuration.
Claim 16
Independent Claim
80 words
A method for imaging a nematic liquid crystalline composition, comprising: a. providing between two electrodes, said nematic liquid crystalline composition in contact with a material selected from the group consisting of tributyltin oxide and tributyltin chloride; and b. applying a voltage across said composition wherein the optical properties of said nematic liquid crystalline composition are changed in areas thereof subjected to said applied voltage; one of said nematic liquid crystalline composition and said applied voltage being provided in imagewise configuration.
Claim 17
Independent Claim
80 words
A method for imaging a nematic liquid crystalline composition, comprising: a. providing between two electrodes, said nematic liquid crystalline composition in contact with a material selected from the group consisting of tributyltin oxide and tributyltin chloride; and b. applying a voltage across said composition wherein the optical properties of said nematic liquid crystalline composition are changed in areas thereof subjected to said applied voltage; one of said nematic liquid crystalline composition and said applied voltage being provided in imagewise configuration.
Claim 18
Dependent Claim
17 words
The method according to claim 14 wherein said nematic liquid crystalline composition is provided in imagewise configuration.
Claim 19
Dependent Claim
14 words
The method according to claim 14 wherein said voltage is applied in imagewise configuration.
Claim 20
Dependent Claim
22 words
The method according to claim 14 wherein said material selected from said group is uniformly dispersed within said nematic liquid crystalline composition.
Claim 21
Dependent Claim
18 words
The method according to claim 14 wherein said material selected from said group is provided in layer configuration.
Claim 22
Dependent Claim
46 words
The method according to claim 14 further including between one of said electrodes and said nematic liquid crystalline composition a layer of photoconductive material and fUrther including in the performance of step (b) the step of irradiating said photoconductive material with actinic radiation in imagewise configuration.
Claim 23
Dependent Claim
13 words
The method according to claim 19 wherein said photoconductive material comprises arsenic triselenide.
Claim 24
Independent Claim
88 words
A method for imaging a nematic liquid crystalline composition, comprising a. providing between two electrodes, a nematic liquid crystalline composition in contact with an imagewise configured layer of material selected from the group consisting of tributyltin oxide and tributyltin chloride; and b. applying a voltage across said nematic liquid crystalline composition wherein the optical properties of said nematic liquid crystalline composition at least in areas thereof corresponding to said imagewise configured layer of said material selected from said group are changed upon being subjected to said applied voltage.
Claim 25
Independent Claim
88 words
A method for imaging a nematic liquid crystalline composition, comprising a. providing between two electrodes, a nematic liquid crystalline composition in contact with an imagewise configured layer of material selected from the group consisting of tributyltin oxide and tributyltin chloride; and b. applying a voltage across said nematic liquid crystalline composition wherein the optical properties of said nematic liquid crystalline composition at least in areas thereof corresponding to said imagewise configured layer of said material selected from said group are changed upon being subjected to said applied voltage.
Claim 26
Dependent Claim
32 words
A NEMATIC LIQUID CRYSTALLINE COMPOSITION COMPRISING A NEMATIC LIQUID CRYSTALLINE MATERIAL AND TRIBUTYLTIN OXIDE, SAID OXIDE PRESENT IN AN AMOUNT EFFECTIVE TO EXTEND THE ELECTRO-OPTICAL LIFETIME OF SAID NEMATIC LIQUID CRYSTALLINE MATERIAL.
Claim 27
Dependent Claim
32 words
A NEMATIC LIQUID CRYSTALLINE COMPOSITION COMPRISING A NEMATIC LIQUID CRYSTALLINE MATERIAL AND TRIBUTYLTIN OXIDE, SAID OXIDE PRESENT IN AN AMOUNT EFFECTIVE TO EXTEND THE ELECTRO-OPTICAL LIFETIME OF SAID NEMATIC LIQUID CRYSTALLINE MATERIAL.
Claim 28
Dependent Claim
20 words
A nematic liquid crystalline composition comprising at least about 0.1% by weight tributyltin oxide and a nematic liquid crystalline material.
Claim 29
Dependent Claim
20 words
A nematic liquid crystalline composition comprising at least about 0.1% by weight tributyltin oxide and a nematic liquid crystalline material.
Claim 30
Dependent Claim
26 words
The composition of claim 23 wherein said tributyltin oxide is present in an amount up to about 10% by weight of the nematic liquid crystalline composition.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |