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US4777280A
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Phenylbenzoate 1-cyanoalkoxy compounds
Assignee: University Patents Inc
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Filing: 1986-07-01
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Granted: 1988-10-11
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Expires: 2006-07-01
Abstract
Abstract The preparation and properties of liquid crystal compounds having an achiral core and chiral tail units composed of the 1-cyanoalkoyl grouping (chiral cyanohydrin ethers) are described. The newly made compounds are shown to be useful as components of ferroelectric liquid crystal mixtures which exhibit high speed, multistate electro-optic switching properties making them ideally suited to certain electro-optic display device applications.
Inventors
- 👤 Kirk F. Eidman
- 👤 David M. Walba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:44
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
29 words
A compound of formula: ##STR6## wherein R is an alkyl of from one to twelve carbon atoms, and R' is an alkyl of from one to thirteen carbon atoms.
Claim 2
Dependent Claim
29 words
A compound of formula: ##STR6## wherein R is an alkyl of from one to twelve carbon atoms, and R' is an alkyl of from one to thirteen carbon atoms.
Claim 3
Dependent Claim
17 words
The compound of claim 1 wherein R is an alkyl of from three to five carbon atoms.
Claim 4
Dependent Claim
17 words
The compound of claim 1 wherein R' is an alkyl of from nine to thirteen carbon atoms.
Claim 5
Dependent Claim
17 words
The compound of claim 1 wherein R' is an alkyl of from five to twelve carbon atoms.
Claim 6
Dependent Claim
26 words
The compound of claim 1 wherein R is an alkyl of from three to five carbon atoms, and R contain from nine to thirteen carbon atoms.
Claim 7
Dependent Claim
16 words
The compound according to claim 5 wherein R is --CH 2 CH 2 CH 3 .
Claim 8
Dependent Claim
18 words
The compound according to claim 5 wherein R is --CH 2 CH 2 CH 2 CH 3 .
Claim 9
Dependent Claim
18 words
The compound according to claim 5 wherein R is --CH 2 (CH 2 ) 3 CH 3 .
Claim 10
Dependent Claim
12 words
The compound according to claim 6 wherein R' contains 9 carbon atoms.
Claim 11
Dependent Claim
12 words
The compound according to claim 6 wherein R' contains 11 carbon atoms.
Claim 12
Dependent Claim
12 words
The compound according to claim 7 wherein R' contains 13 carbon atoms.
Claim 13
Dependent Claim
12 words
The compound according to claim 8 wherein R' contains 10 carbon atoms.
Claim 14
Dependent Claim
12 words
The compound according to claim 8 wherein R' contains 11 carbon atoms.
References Cited (Backward Citations)
US4528394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |