US3894794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal imaging system using tribulyltin oxide
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 Electro-optical lifetimes of liquid crystalline compositions comprising a nematic liquid crystalline material and an optically active material are extended by contact with tributyltin oxide.
Inventors
- 👤 Jr Charles W Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:52
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/36; C09K19/52; C09K19/54; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133703; G02F1/133711; G02F1/137; G02F1/13743; G02F1/1375; G02F1/133374
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
44 words
A LIQUID CRYSTALLINE COMPOSITION COMPRISING A MIXTURE OF NEMATIC LIQUID CRYSTALLINE MATERIAL AND AN OPTICALLY ACTIVE MATERIAL, AND TRIBUTYLTIN OXIDE, SAID OXIDE PRESENT IN AN AMOUNT EFFECTIVE TO EXTEND THE ELECTRO-OPTICAL LIFETIME OF SAID MIXTURE OF NEMATIC LIQUID CRYSTALLINE MATERIAL AND OPTICALLY ACTIVE MATERIAL.
Claim 2
Dependent Claim
44 words
A LIQUID CRYSTALLINE COMPOSITION COMPRISING A MIXTURE OF NEMATIC LIQUID CRYSTALLINE MATERIAL AND AN OPTICALLY ACTIVE MATERIAL, AND TRIBUTYLTIN OXIDE, SAID OXIDE PRESENT IN AN AMOUNT EFFECTIVE TO EXTEND THE ELECTRO-OPTICAL LIFETIME OF SAID MIXTURE OF NEMATIC LIQUID CRYSTALLINE MATERIAL AND OPTICALLY ACTIVE MATERIAL.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein said optically active material is a cholesteric liquid crystalline material.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein said optically active material is a non-mesomorphic material.
Claim 5
Dependent Claim
23 words
The device according to claim 1 wherein said mixture of nematic liquid crystalline material and optically active material is provided in imagewise configuration.
Claim 6
Dependent Claim
28 words
A nematic liquid crystalline composition comprising a mixture of nematic liquid crystalline material and an optically active material, and at least about 0.1 percent by weight tributyltin oxide.
Claim 7
Dependent Claim
28 words
A nematic liquid crystalline composition comprising a mixture of nematic liquid crystalline material and an optically active material, and at least about 0.1 percent by weight tributyltin oxide.
Claim 8
Dependent Claim
26 words
The composition of claim 5 wherein said tributyltin oxide is present in an amount up to about 10 percent by weight of the liquid crystalline composition.
Claim 9
Dependent Claim
25 words
An electro-optic device, comprising between two electrodes tributyltin oxide in contact with a mixture of a nematic liquid crystalline material and an optically active material.
Claim 10
Dependent Claim
25 words
An electro-optic device, comprising between two electrodes tributyltin oxide in contact with a mixture of a nematic liquid crystalline material and an optically active material.
Claim 11
Dependent Claim
15 words
The device according to claim 7 wherein said oxide is uniformly dispersed within said mixture.
Claim 12
Dependent Claim
13 words
The method according to claim 7 wherein said oxide is in layer configuration.
Claim 13
Dependent Claim
16 words
The device according to claim 9 wherein said layer of tributyltin oxide is in imagewise configuration.
Claim 14
Dependent Claim
15 words
The device according to claim 7 wherein one of said electrodes is in imagewise configuration.
Claim 15
Independent Claim
68 words
A method for imaging a mixture of a nematic liquid crystalline material and an optically active material, comprising: a. providing between two electrodes, said mixture in contact with tributylin oxide; and b. applying a voltage across said mixture wherein the optical properties of said mixture are changed in areas thereof subjected to said applied voltage; one of said mixture and said applied voltage being provided in imagewise configuration.
Claim 16
Independent Claim
68 words
A method for imaging a mixture of a nematic liquid crystalline material and an optically active material, comprising: a. providing between two electrodes, said mixture in contact with tributylin oxide; and b. applying a voltage across said mixture wherein the optical properties of said mixture are changed in areas thereof subjected to said applied voltage; one of said mixture and said applied voltage being provided in imagewise configuration.
Claim 17
Dependent Claim
14 words
The method according to claim 12 wherein said mixture is provided in imagewise configuration.
Claim 18
Dependent Claim
14 words
The method according to claim 12 wherein said voltage is applied in imagewise configuration.
Claim 19
Dependent Claim
16 words
The method according to claim 12 wherein said tributyltin oxide is uniformly dispersed within said mixture.
Claim 20
Dependent Claim
15 words
The method according to claim 12 wherein said tributyltin oxide is provided in layer configuration.
Claim 21
Dependent Claim
43 words
The method according to claim 12 further including between one of said electrodes and said mixture 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 22
Dependent Claim
13 words
The method according to claim 17 wherein said photoconductive material comprises arsenic triselenide.
Claim 23
Independent Claim
76 words
A method for imaging a mixture of nematic liquid crystalline mAterial and an optically active material, comprising: a. providing between two electrodes, a layer of tributyltin oxide in imagewise configuration in contact with said mixture; and b. applying a voltage across said mixture wherein the optical properties of said nematic liquid crystalline composition at least in areas thereof corresponding to said imagewise configured layer of tributyltin oxide are changed upon being subjected to said applied voltage.
Claim 24
Independent Claim
76 words
A method for imaging a mixture of nematic liquid crystalline mAterial and an optically active material, comprising: a. providing between two electrodes, a layer of tributyltin oxide in imagewise configuration in contact with said mixture; and b. applying a voltage across said mixture wherein the optical properties of said nematic liquid crystalline composition at least in areas thereof corresponding to said imagewise configured layer of tributyltin oxide are changed upon being subjected to said applied voltage.
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 |