US4603018A
Expired / Lapsed
US
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2-cyano-4-halogenophenyl esters
Assignee: JNC Corp
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Filing: 1983-09-09
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Granted: 1986-07-29
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Expires: 2003-09-09
Abstract
Abstract New compounds useful as constituents of liquid crystal compositions exhibiting a negative dielectric anisotropy are provided, which are 2-cyano-4-halogenophenyl esters expressed by the general formula <IMAGE> (I) wherein R represents hydrogen atom or an alkyl group or an alkoxy group of 1 to 10 carbon atoms; <IMAGE> each represent either one of <IMAGE> l, m and n each represent 0 or 1 and the total of l+m+n is 1, 2 or 3; X represents F or Cl; and Y and Z each represent hydrogen atom or F or Cl.
Inventors
- 👤 Shigeru Sugimori
- 👤 Toyoshiro Isoyama
- 👤 Tetsuhiko Kojima
- 👤 Yasuyuki Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:56
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
The 2-cyano-4-halogenophenyl esters expressed by the formula: ##STR53## wherein D is selected from the group consisting of ##STR54## wherein R represents hydrogen atom or an alkyl group or an alkoxy group of 1 to 10 carbon atoms; ##STR55## each represent either one of ##STR56## X represents F or Cl; and Y and Z each represent a hydrogen atom or F or Cl.
Claim 2
Dependent Claim
62 words
The 2-cyano-4-halogenophenyl esters expressed by the formula: ##STR53## wherein D is selected from the group consisting of ##STR54## wherein R represents hydrogen atom or an alkyl group or an alkoxy group of 1 to 10 carbon atoms; ##STR55## each represent either one of ##STR56## X represents F or Cl; and Y and Z each represent a hydrogen atom or F or Cl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |