US4931209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystalline materials and method of making
Assignee: CRYSTALOID ELECTRONICS Co 5282 HUDSON DRIVE HUDSON OH 44236 A CORP OF OH
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Filing: 1986-09-25
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Granted: 1990-06-05
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Expires: 2006-09-25
Abstract
Abstract A new family of liquid crystalline or potential liquid crystalline compounds is made relatively cheaply generally by reducing an acid chlorine derivative alkyl or alkoxy benzene or its analogues of an alkyl cyclohexanoic acid to an alkanol derivative, converting the alkanol derivative to a halide such as the bromide or chloride and reacting said halide with a cyano phenol, cyanodiphenol and related compound to form a compound having the formula of equation 1.
Inventors
- 👤 Joseph P. Ferrato
- 👤 Julie C. Ferrato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:26
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/49; C07C255/54; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
A compound suitable for use as a liquid crystal having the formula: ##STR5## where R 1 is alkyl or alkoxy of 1 to 8 carbon atoms, alkylcyclohexyl of 7 to 12 carbon atoms, hydrogen, chloride or cyano, R 2 is alkyl alkoxy of 1 to 3 carbon atoms, halide, or cyano and is present at the 2 or 3 position of the transcyclohexyl ring, R 3 is methylene, n is 1, 2 or 3, and X y is an alkyl, alkoxy, halogen or cyano group that has replaced hydrogen in the ring and each of y designates the number of hydrogens that has been replaced on each ring and has values up to 4 and R 1 , R 2 , X y and X y ' can be the same or different radicals.
Claim 2
Dependent Claim
134 words
A compound suitable for use as a liquid crystal having the formula: ##STR5## where R 1 is alkyl or alkoxy of 1 to 8 carbon atoms, alkylcyclohexyl of 7 to 12 carbon atoms, hydrogen, chloride or cyano, R 2 is alkyl alkoxy of 1 to 3 carbon atoms, halide, or cyano and is present at the 2 or 3 position of the transcyclohexyl ring, R 3 is methylene, n is 1, 2 or 3, and X y is an alkyl, alkoxy, halogen or cyano group that has replaced hydrogen in the ring and each of y designates the number of hydrogens that has been replaced on each ring and has values up to 4 and R 1 , R 2 , X y and X y ' can be the same or different radicals.
Claim 3
Dependent Claim
13 words
The composition of claim 1 where n is 1 and y' is one.
Claim 4
Dependent Claim
14 words
The composition of claim 1 where n is 1 and y' is not 0.
Claim 5
Dependent Claim
16 words
The composition of claim 1 where n is 1 and the rings contain an X substituent.
Claim 6
Dependent Claim
30 words
The composition of claim 1 where n is 1 R 1 is an alkyl of 1 to 8 carbon atoms, and the rings have an X substituent other than alkyl.
Claim 7
Dependent Claim
26 words
The composition of claim 1 where n is 1, R 2 is alkyl of 1 to 3 carbon atoms and the rings have an X substituent.
Claim 8
Dependent Claim
15 words
The composition of claim 1 where the X y ' substituent is fluoride or cyanide.
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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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |