Patent US4696759A successfully refreshed from Google Patents.
US4696759A
Expired / Lapsed
US
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Ester compound
Assignee: JNC Corp
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Filing: 1986-05-05
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Granted: 1987-09-29
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Expires: 2006-05-05
Abstract
Abstract A novel ester compound exhibiting liquid crystal phases within a broad temperature range and having a low viscosity and a high compatibility with liquid crystal compounds, and a liquid crystal composition containing the same are provided, which ester compound is expressed by the formula <IMAGE> wherein X represents F or Cl; Y and Z each represent H, F or Cl and when either one of Y or Z is H, the other is F or Cl and further when X is Cl, Y and Z are not both Cl; -A- represents a member selected from the group consisting of <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> +TR <IMAGE> and R represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms.
Inventors
- 👤 Toyoshiro Isoyama
- 👤 Yasuyuki Goto
- 👤 Tetsuya Ogawa
- 👤 Shigeru Sugimori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:14
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C09K19/10; C09K19/20; C09K19/2007; C09K19/32; C09K19/322
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
An ester compound expressed by the formula ##STR24## wherein X represents F; Y represents H, F or Cl; Z represents F or H, with the proviso that when Y is F or Cl, Z is H and when Z is F, Y is H; --A-- represents a member selected from the group consisting of ##STR25## and R represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms.
Claim 2
Dependent Claim
72 words
An ester compound expressed by the formula ##STR24## wherein X represents F; Y represents H, F or Cl; Z represents F or H, with the proviso that when Y is F or Cl, Z is H and when Z is F, Y is H; --A-- represents a member selected from the group consisting of ##STR25## and R represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms.
Claim 3
Dependent Claim
35 words
A 3,4-dihalogenobenzoic acid ester compound according to claim 1, expressed by the formula ##STR26## wherein X is F and Y is F or Cl; and --A-- and R are each as defined in claim 1.
Claim 4
Dependent Claim
33 words
A 2,4-dihalogenobenzoic acid ester compound according to claim 1, expressed by the formula ##STR27## wherein X and Z each represent F; and --A-- and R each are as defined above in claim 1.
Claim 5
Dependent Claim
24 words
A liquid crystal composition having at least two components at least one of which is an ester compound as set forth in claim 1.
Claim 6
Dependent Claim
20 words
An ester compound expressed by the formula ##STR28## wherein R is an alkyl group of 1 to 10 carbon atoms.
Claim 7
Dependent Claim
20 words
An ester compound expressed by the formula ##STR28## wherein R is an alkyl group of 1 to 10 carbon atoms.
Claim 8
Dependent Claim
14 words
A compound according to claim 5 wherein R is --C 5 H 11 .
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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) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |