US4544771A
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Halogenobiphenyl derivatives
Assignee: Merck Patent GmbH
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Filing: 1985-02-08
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Granted: 1985-10-01
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Expires: 2005-02-08
Abstract
Abstract Halogenobiphenyl derivatives of Formula I ##STR1## wherein R 1 and R 2 are each alkyl or alkoxy in each case of 1-10 C atoms, Cy is 1,4-cyclohexylene, Ph is 1,4-phenylene, Q is --O--Cy-- or --O--Ph--, m and n are each 0 or 1 and X is F, Cl or Br, can be used as components of liquid crystal dielectrics for electrooptical display elements.
Inventors
- 👤 Michael Romer
- 👤 Joachim Krause
- 👤 Georg Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C45/61; C07C45/63; C07C49/00; C07C49/76; C07C49/80; C07C49/813; C07C49/84; C09K19/10; C09K19/12; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
98 words
A halogenobiphenyl derivative of the formula ##STR6## wherein R 1 and R 2 are each alkyl or alkoxy each of 1-10 C atoms; Cy is 1,4-cyclohexylene; Ph is 1,4-phenylene; Q is --O--Cy-- or --O--Ph; m and n are each 0 or 1; and X is F, Cl or Br, with the proviso that when R 1 is alkoxy, R 2 is alkyl and m and n are both 0, then X is not Br; and when R 1 and R 2 are both alkoxy and m and n are both 0, then X is not F or Cl.
Claim 2
Dependent Claim
98 words
A halogenobiphenyl derivative of the formula ##STR6## wherein R 1 and R 2 are each alkyl or alkoxy each of 1-10 C atoms; Cy is 1,4-cyclohexylene; Ph is 1,4-phenylene; Q is --O--Cy-- or --O--Ph; m and n are each 0 or 1; and X is F, Cl or Br, with the proviso that when R 1 is alkoxy, R 2 is alkyl and m and n are both 0, then X is not Br; and when R 1 and R 2 are both alkoxy and m and n are both 0, then X is not F or Cl.
Claim 3
Dependent Claim
6 words
4'-Acetyl-2-fluoro-4-(4-trans-n-pentylcyclohexyl)biphenyl a compound of claim 1.
Claim 4
Dependent Claim
14 words
A compound of claim 1 wherein R 1 and R 2 are straight chained.
Claim 5
Dependent Claim
13 words
A compound of claim 1 wherein R 1 and R 2 are alkyl.
Claim 6
Dependent Claim
16 words
A compound of claim 1 wherein R 1 and R 2 are of 1-6 C atoms.
Claim 7
Dependent Claim
26 words
A compound of claim 1 of the formula R.sup.1 --Cy--Phx--Ph--CO--R.sup.3 R.sup.1 --Phx--Ph--COOR.sup.3 wherein R 3 is C 1-10 -alkyl and Phx is 1,4-phenylene substituted by X.
Claim 8
Dependent Claim
46 words
A compound of claim 1 of the formula R 1 --Phx--Ph--CO--R 3 R 1 --Phx--Ph--CO--O--Cy--R 2 R 1 --Phx--Ph--CO--O--Ph--R 2 R 1 --Cy--Phx--Ph--COOR 3 R 1 --Cy--Phx--Ph--CO--O--Cy--R- 2 R 1 --Cy--Phx--Ph--CO--O--Ph--R 2 wherein R 3 is C 1-10 -alkyl and Phx is 1,4-phenylene substituted by X.
Claim 9
Dependent Claim
21 words
A compound of claim 1 wherein one of R 1 and R 2 is branched and contains only 1 chain branching.
Claim 10
Dependent Claim
16 words
A compound of claim 1 wherein all cyclohexylene radicals contain both substituents in the trans position.
Claim 11
Dependent Claim
20 words
A compound of claim 1 wherein X is in the 2' position with respect to the adjacent unsubstituted 1,4-phenylene group.
Claim 12
Dependent Claim
15 words
A compound of claim 1 wherein one or both of m and n are 1.
Claim 13
Dependent Claim
12 words
A compound of claim 1 wherein m=n=0 and R 1 is alkyl.
Claim 14
Dependent Claim
24 words
A compound of claim 1 of the formula: R.sup.1 --Cy--Phx--Ph--CO--R.sup.3 wherein R 3 is C 1-10 -alkyl and Phx is 1,4-phenylene substituted by x.
Claim 15
Dependent Claim
24 words
A compound of claim 1 of the formula: R.sup.1 --Cy--Phx--Ph--COOR.sup.3 wherein R 3 is C 1-10 -alkyl and Phx is 1,4-phenylene substituted by x.
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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) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |