US3910682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal cells
Assignee: DIC Corp
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Filing: 1973-07-11
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Granted: 1975-10-07
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Expires: 1993-07-11
Abstract
Abstract A liquid crystal cell composed of two support plates which are arranged in parallel to each other and at least one of which is transparent, and a nematic liquid crystal substance filled between the two support plates, wherein a coating of a fluorinecontaining surface active agent is formed on the opposing surfaces of the two support plates.
Inventors
- 👤 Yoshi Arai
- 👤 Shoichi Kinoshita
- 👤 Kazuo Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:47
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133719; C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/22; C09K19/52; C09K2019/528; C09K2323/00; C09K2323/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
IN A LIQUID CRYSTAL CELL COMPOSED OF TWO SUPPORT PLATES WHICH ARE ARRANGED IN PARALLEL TO ECAH OTHER AND AT LEAST ONE OF WHICH IS TRANSPARENT, AND A NEMATIC LIQUID CRYSTAL SUBSTANCE FILLED BETWEEN SAID TWO SUPPORT PLATES, THE IMPROVEMENT WHEREIN A COATING OF A FLUORINE-CONTAINING SURFACE ACITIVE AGENT IS FORMED ON THE OPPOSITE SURFACES OF THE TWO SUPPORT PLATES WHEREIN SAID FLUORINE-CONTAINING SURAFE ACTIVE AGENT IS A COMPOUND HAVING A FLUORO-CARBON GROUP OF FORMULA-CNF2N+1 WHEREIN N IS 5 TO 10 AS A HYDROPHOBOLIC ATOM GROUP AND A CATIONIC ATOM GROUP SELECTED FROM THE GROUP CONSISTING OF -N+ (R1)3X- WHEREIN R1 IS LOWER ALKYL GROUP AND X IS AN ACID GROUP AS A HYDROPHILIC ATOMIC GROUP AND -N(R3)2.HX WHEREIN R3 IS A LOWER ALKYL AND X IS HALOGEN ATOM AS A HYDROPHILIC ATOMIC GROUP.
Claim 2
Dependent Claim
134 words
IN A LIQUID CRYSTAL CELL COMPOSED OF TWO SUPPORT PLATES WHICH ARE ARRANGED IN PARALLEL TO ECAH OTHER AND AT LEAST ONE OF WHICH IS TRANSPARENT, AND A NEMATIC LIQUID CRYSTAL SUBSTANCE FILLED BETWEEN SAID TWO SUPPORT PLATES, THE IMPROVEMENT WHEREIN A COATING OF A FLUORINE-CONTAINING SURFACE ACITIVE AGENT IS FORMED ON THE OPPOSITE SURFACES OF THE TWO SUPPORT PLATES WHEREIN SAID FLUORINE-CONTAINING SURAFE ACTIVE AGENT IS A COMPOUND HAVING A FLUORO-CARBON GROUP OF FORMULA-CNF2N+1 WHEREIN N IS 5 TO 10 AS A HYDROPHOBOLIC ATOM GROUP AND A CATIONIC ATOM GROUP SELECTED FROM THE GROUP CONSISTING OF -N+ (R1)3X- WHEREIN R1 IS LOWER ALKYL GROUP AND X IS AN ACID GROUP AS A HYDROPHILIC ATOMIC GROUP AND -N(R3)2.HX WHEREIN R3 IS A LOWER ALKYL AND X IS HALOGEN ATOM AS A HYDROPHILIC ATOMIC GROUP.
Claim 3
Dependent Claim
16 words
The liquid crystal cell of claim 1 wherein said two support plates are transparent glass plates.
Claim 4
Dependent Claim
39 words
The liquid crystal cell of claim 1 wherein said two suppport plates are transparent glass plates having formed on their one surface a transparent electrically conductive layer, and are arranged such that the transparent conductive layers face each other.
Claim 5
Dependent Claim
24 words
The liquid crystal cell of claim 3 wherein said transparent electrically conductive layer is a layer of tin oxide (SnO2) or indium oxide (In2O3).
Claim 6
Dependent Claim
19 words
The liquid crystal cell of claim 1 wherein said fluorine-containing surface active agent is a compound of the formula
Claim 7
Dependent Claim
20 words
The liquid crystal cell of claim 1 wherein said fluorine-containing surface active agent is a compound of the structural formula
Claim 8
Dependent Claim
20 words
The liquid crystal cell of claim 1 wherein said fluorine-containing surface active agent is a compound expressed by the formula
Claim 9
Dependent Claim
20 words
The liquid crystal cell of claim 1 wherein said fluorine-containing surface active agent is a compound expressed by the formula
Claim 10
Dependent Claim
19 words
The liquid crystal cell of claim 1 wherein said nematic liquid crystal substance is a p-alkoxybenzal-p''-butyl-aniline of the formula
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |