Patent US4031028A successfully refreshed from Google Patents.
US4031028A
Expired / Lapsed
US
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Nematic liquid crystal composition
Assignee: Motorola Solutions Inc
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Filing: 1976-06-18
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Granted: 1977-06-21
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Expires: 1996-06-18
Abstract
Abstract Liquid crystal compositions consisting essentially of certain N-(p-alkyloxybenzylidene)-p-alkylanilines with certain p-alkoxyphenyl-p'-alkylbenzoates and/or p-alkylphenyl-p'-cyanobenzoates exhibit a glassy structure at low temperatures, rather than a solid crystal form. The compositions also have a broad operating temperature range, suitable for use in liquid crystal displays. Liquid crystal displays incorporating these compositions maintain high contrast when exposed to low temperatures, while conventional liquid crystal compositions lose high contrast when so exposed to low temperatures.
Inventors
- 👤 Robert Craig Maze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:38
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
28 words
The liquid crystal composition consisting essentially of the compounds N-(p-methoxybenzylidene)-p-butylaniline, N-(p-ethoxybenzylidene)-p-butylaniline, p[(butyloxybenzylidene)-amino] benzonitrile, p-pentyloxyphenyl-p'-pentylbenzoate, and p-pentylphenyl-p'-cyanobenzoate, said compounds to be present in said composition in substantially eutectic proportions.
Claim 2
Dependent Claim
28 words
The liquid crystal composition consisting essentially of the compounds N-(p-methoxybenzylidene)-p-butylaniline, N-(p-ethoxybenzylidene)-p-butylaniline, p[(butyloxybenzylidene)-amino] benzonitrile, p-pentyloxyphenyl-p'-pentylbenzoate, and p-pentylphenyl-p'-cyanobenzoate, said compounds to be present in said composition in substantially eutectic proportions.
Claim 3
Dependent Claim
28 words
The liquid crystal composition consisting essentially of the compounds p-methoxyphenyl-p'-pentylbenzoate, p-butylphenyl-p'-cyanobenzoate, p-pentylphenyl-p'-cyanobenzoate, p-diphenyl-p'-cyanobenzoate, and N-(p-ethoxybenzylidene) p-butylaniline, said compounds to be present in said composition in substantially eutectic proportions.
Claim 4
Dependent Claim
28 words
The liquid crystal composition consisting essentially of the compounds p-methoxyphenyl-p'-pentylbenzoate, p-butylphenyl-p'-cyanobenzoate, p-pentylphenyl-p'-cyanobenzoate, p-diphenyl-p'-cyanobenzoate, and N-(p-ethoxybenzylidene) p-butylaniline, said compounds to be present in said composition in substantially eutectic proportions.
Claim 5
Dependent Claim
28 words
The liquid crystal composition consisting essentially of the compounds N-(p-methoxybenzylidene)-p-butylaniline, N-(p-ethoxybenzylidene)-p-butylaniline, p-[(butyloxybenzylidene)-amino] benzonitrile, p-butylphenyl-p'-cyanobenzoate, and p-pentylphenyl-p'-cyanobenzoate, said compounds to be present in said composition in substantially eutectic proportions.
Claim 6
Dependent Claim
28 words
The liquid crystal composition consisting essentially of the compounds N-(p-methoxybenzylidene)-p-butylaniline, N-(p-ethoxybenzylidene)-p-butylaniline, p-[(butyloxybenzylidene)-amino] benzonitrile, p-butylphenyl-p'-cyanobenzoate, and p-pentylphenyl-p'-cyanobenzoate, said compounds to be present in said composition in substantially eutectic proportions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |