US3816334A
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Liquid crystals stable against electrolytic decomposition and display device utilizing same
Assignee: Suwa Seikosha KK
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Filing: 1971-09-27
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Granted: 1974-06-11
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Expires: 1991-09-27
Abstract
Abstract Liquid crystals stable against electrolytic attack, and, in particular, hydrolysis, have two aromatic nuclei linked through an azo grouping. One of the rings is substituted in the para position with an alkyl group, and the other is substituted in the para position with an alkoxyl or an acyloxy group. These materials resist electrolytic attack even in the presence of small quantities of water. Compositions having a mesomorphic range including or somewhat above room temperature are disclosed. An electro-optical display device utilizing such liquid crystal composition is described.
Inventors
- 👤 Y Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:54
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/28; C07; C07C; C07C245/00; C07C245/02; C07C245/06; C07C245/08; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/24; C09K19/42
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
19 words
The composition as defined in claim 1, wherein said first compound is p-(p''-ethylphenylazo)-phenylhexanoate and said second compound is p-(p''-ethylphenylazo)-phenylheptanoate.
Claim 2
Dependent Claim
19 words
The composition as defined in claim 1, wherein said first compound is p-(p''-ethylphenylazo)-phenylhexanoate and said second compound is p-(p''-ethylphenylazo)-phenyloctanoate.
Claim 3
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(p''-ethylphenylazo)-phenylhexanoate and said second compound is butyl p-(p''-ethoxyphenoxycarbonyl) phenylcarbonate.
Claim 4
Dependent Claim
19 words
The composition as defined in claim 1, wherein said first compound is p-(p''-methoxyphenylazo)-phenylbutane. and said second compound is p-(p''-ethoxyphenylazo)-phenylbutane.
Claim 5
Dependent Claim
19 words
The composition as defined in claim 1, wherein said first compound is p-(p''-ethoxyphenylazo)-phenylbutane and said second compound is p-ethoxybenzylidene-p''-butylaniline.
Claim 6
Dependent Claim
19 words
The composition as defined in claim 1, wherein said first compound is p-(p''-methoxyphenylazo)-phenylbutane and said second compound is p-(p''-ethylphenylazo)-phenylhexanoate.
Claim 7
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(3-methyl-4hexanoyloxyphenylazo) phenylbutane and said second compound is p-(p''-ethoxyphenoxycarbonyl) phenylcarbonate.
Claim 8
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(3-methyl-4-hexanoyloxyphenylazo) phenylbutane and said second compound is p-(p''-ethylphenylazo) phenylhexanoate.
Claim 9
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(p''-octanoyloxyphenylazo) phenylbutane and said second compound is p-(p''-nonanoyloxyphenylazo) phenylbutane.
Claim 10
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(p''-heptanoyloxyphenylazo) phenylbutane and said second compound is p-(p''-octanoyloxyphenylazo) phenylbutane.
Claim 11
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(p''-octanoyloxyphenylazo) phenylbutane and said second compound is p-(p''-n-hexylphenoxycarbonyl) phenylether.
Claim 12
Dependent Claim
22 words
The composition as defined in claim 1, wherein said first compound is p-(p''-octanoyloxyphenylazo) phenylbutane and said second compound is butyl p-(p''-ethoxyphenoxycarbonyl) phenylcarbonate.
Claim 13
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(p''-n-propylphenylazo) phenylheptanoate and said second compound is p-(p''-n-propylphenylazo) phenyloctanoate.
Claim 14
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(p''-n-propylphenylazo) phenylheptanoate and said second compound is p-(p''-n-hexanoylphenoxycarbonyl) phenylether.
Claim 15
Dependent Claim
21 words
The composition as defined in claim 1, wherein said first compound is p-(p''-n-propylphenylazo) phenylheptanoate and said second compound is p-(p''-ethoxyphenoxycarbonyl) phenylcarbonate.
Claim 16
Dependent Claim
19 words
A composition consisting essentially of p-(p''-n-propylphenylazo) phenylheptanoate, p-(p''-n-propylphenylazo) phenyloctanoate and p-(p''-n-propylphenylazo) phenylhexanoate in a mole ratio of approximately 2:1:1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |