US4695650A
Expired / Lapsed
US
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Liquid crystal compounds and compositions containing same
Assignee: University Research Corp
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Filing: 1986-09-24
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Granted: 1987-09-22
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Expires: 2006-09-24
Abstract
Abstract Liquid crystals having the general formula: <IMAGE> wherein R is an alkyl group of three to twelve carbon atoms, R' is an alkyl of five to twelve carbon atoms, and X is a chlorine atom or a fluorine atom. Preferred alkyl groups for R' are octyl. The compounds are particularly useful in mixtures with other liquid crystal compounds in which they exhibit synergistic effects.
Inventors
- 👤 David M. Walba
- 👤 Homaune A. Razavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
A compound of the formula: ##STR7## wherein R is an alkyl group containing three to twelve carbon atoms, R' is an alkyl group containing five to twelve carbon atoms and X is selected from the group consisting of chlorine and fluorine.
Claim 2
Dependent Claim
41 words
A compound of the formula: ##STR7## wherein R is an alkyl group containing three to twelve carbon atoms, R' is an alkyl group containing five to twelve carbon atoms and X is selected from the group consisting of chlorine and fluorine.
Claim 3
Dependent Claim
11 words
A compound according to claim 1 in which X is chlorine.
Claim 4
Dependent Claim
11 words
A compound according to claim 1 in which X is fluorine.
Claim 5
Dependent Claim
16 words
A compound according to claim 1, claim 2, or claim 3 in which R is n-octyl.
Claim 6
Dependent Claim
12 words
The compound of claim 4 in which R' contains 10 carbon atoms.
Claim 7
Dependent Claim
9 words
The compound of claim 5 wherein R' is n-decyl.
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JPS5388677A
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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) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |