Patent US3854793A successfully refreshed from Google Patents.
US3854793A
Expired / Lapsed
US
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Liquid crystal cells
Assignee: AT&T Inc
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Filing: 1972-06-27
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Granted: 1974-12-17
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Expires: 1992-06-27
Abstract
Abstract A liquid crystal display cell for use in, for example, a schlieren optics projection system, constructed in accordance with the principles of the present invention, includes a pair of support substrates for supporting and containing a liquid crystal substance. A thin layer of a silane coupling agent intermediate at least one of the substrates and the liquid crystal substance comprises an orienting medium. In particular, the silane molecules react with the substrate to form a chemical bond with the molecules of the substrate. In addition, the silane molecules interact with the liquid crystal molecules in such a manner as to cause the liquid crystal molecules to assume a preferred orientational order.
Inventors
- 👤 F Kahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:52
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133719; C; C09; C09K; C09K2323/00; C09K2323/05; C09K2323/053; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
IN COMBINATION A THIN FIRST OF LIQUID CRYSTAL MATERIAL, FIRST AND SECOND SUBSTRATES, SPACING MEANS POSITIONED BETWEEN SAID SUBSTRATES, SAID SUBSTRATES AND SPACING MEANS THEREBY DEFINING AN ENVELOPE SURROUNDING SAID THIN FILM, A LAYER OF BONDING MATERIAL CHEMICALLY BONDED TO AT LEAST ONE OF SAID SUBSTRATES AND POSITIONED SUBSTANTIALLY CONTIGUOUS WITH SAID THIN FILM WHEREIN SAID BONDING MATERIAL IS N,N-DIMETHYL-N-OCTADECYL-3-AMINOPROPYLTRIMETHOXYSILYL CHLORIDE.
Claim 2
Dependent Claim
61 words
IN COMBINATION A THIN FIRST OF LIQUID CRYSTAL MATERIAL, FIRST AND SECOND SUBSTRATES, SPACING MEANS POSITIONED BETWEEN SAID SUBSTRATES, SAID SUBSTRATES AND SPACING MEANS THEREBY DEFINING AN ENVELOPE SURROUNDING SAID THIN FILM, A LAYER OF BONDING MATERIAL CHEMICALLY BONDED TO AT LEAST ONE OF SAID SUBSTRATES AND POSITIONED SUBSTANTIALLY CONTIGUOUS WITH SAID THIN FILM WHEREIN SAID BONDING MATERIAL IS N,N-DIMETHYL-N-OCTADECYL-3-AMINOPROPYLTRIMETHOXYSILYL CHLORIDE.
Claim 3
Dependent Claim
60 words
In combination a thin film of liquid crystal material, first and second substrates, spacing means positioned between said substrates, said substrates and spacing means thereby defining an envelope surrounding said thin film, a layer of bonding material chemically bonded to at least one of said substrates and positioned substantially contiguous with said thin film wherein said bonding material is methylaminopropyltrimethoxysilane.
Claim 4
Dependent Claim
60 words
In combination a thin film of liquid crystal material, first and second substrates, spacing means positioned between said substrates, said substrates and spacing means thereby defining an envelope surrounding said thin film, a layer of bonding material chemically bonded to at least one of said substrates and positioned substantially contiguous with said thin film wherein said bonding material is methylaminopropyltrimethoxysilane.
Claim 5
Dependent Claim
73 words
In combination a thin film of liquid crystal material, first and second substrates, spacing means positioned between said substrates, said substrates and spacing means thereby defining an envelope surrounding said thin film, a layer of N,N-dimethyl-N-octadecyl-3-aminopropyltrimethoxysilyl chloride chemically bonded to one of said substrates and positioned substantially contiguous with said thin film and a layer of methylaminopropyltrimethoxysilane chemically bonded to the other of said substrates and positioned substantially contiguous with said thin film.
Claim 6
Dependent Claim
73 words
In combination a thin film of liquid crystal material, first and second substrates, spacing means positioned between said substrates, said substrates and spacing means thereby defining an envelope surrounding said thin film, a layer of N,N-dimethyl-N-octadecyl-3-aminopropyltrimethoxysilyl chloride chemically bonded to one of said substrates and positioned substantially contiguous with said thin film and a layer of methylaminopropyltrimethoxysilane chemically bonded to the other of said substrates and positioned substantially contiguous with said thin film.
Claim 7
Dependent Claim
60 words
In combination a thin film of liquid crystal material, first and second substrates, spacing means positioned between said substrates, said substrates and spacing means thereby defining an envelope surrounding said thin film, a layer of bonding material chemically bonded to at least one of said substrates and positioned substantially contiguous with said thin film wherein said bonding material is octadecyldisilizane.
Claim 8
Dependent Claim
60 words
In combination a thin film of liquid crystal material, first and second substrates, spacing means positioned between said substrates, said substrates and spacing means thereby defining an envelope surrounding said thin film, a layer of bonding material chemically bonded to at least one of said substrates and positioned substantially contiguous with said thin film wherein said bonding material is octadecyldisilizane.
References Cited (Backward Citations)
US3728008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |