US4630896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzonitriles
Assignee: F Hoffmann La Roche AG
•
Filing: 1984-05-29
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Granted: 1986-12-23
•
Expires: 2004-05-29
Abstract
Abstract Compounds of the formula: ##STR1## wherein one of X 1 and X 2 is --CH 2 CH 2 -- and the other is --CH 2 CH 2 -- or a single covalent bond, ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R 1 is straight-chain C 1 -C 12 -alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight chain C 1 -C 12 -alkoxy.
Inventors
- 👤 Martin Petrzilka
- 👤 Alois Villiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:03
CPC Classifications
C; C07; C07C; C07C255/00; C07C31/00; C07C31/13; C07C31/133; C07C31/135; C07C31/1355; C07C45/00; C07C45/44; C07C45/51; C07C45/511; C07C45/513; C07C47/00; C07C47/02; C07C47/105; C07C47/11; C07C63/00; C07C63/33; C07C63/49; C07C63/66; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5435; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3028
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
A compound of the formula ##STR8## wherein ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R 1 is straight-chain C 1 -C 12 -alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight chain C 1 -C 12 -alkoxy.
Claim 2
Dependent Claim
42 words
A compound of the formula ##STR8## wherein ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R 1 is straight-chain C 1 -C 12 -alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight chain C 1 -C 12 -alkoxy.
Claim 3
Dependent Claim
34 words
The compound of claim 1, wherein R 1 is straight-chain C 1 -C 7 -alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight chain C 1 -C 6 -alkoxy.
Claim 4
Dependent Claim
16 words
The compound of claim 1, wherein R 1 is straight chain C 1 -C 12 alkyl.
Claim 5
Dependent Claim
17 words
The compound of claim 3 wherein R 1 is a straight chain C 1 -C 7 alkyl.
Claim 6
Dependent Claim
57 words
A liquid crystalline mixture comprising at least two components, at least one of said components is a compound of the formula: ##STR9## wherein ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R 1 is straight-chain C 1 -C 12 alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight-chain C 1 -C 12 -alkoxy.
Claim 7
Dependent Claim
57 words
A liquid crystalline mixture comprising at least two components, at least one of said components is a compound of the formula: ##STR9## wherein ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R 1 is straight-chain C 1 -C 12 alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight-chain C 1 -C 12 -alkoxy.
Claim 8
Dependent Claim
77 words
An electro optical cell comprising: (a) two plate means; (b) a liquid crystal means disposed between the two plate means and including a compound of the formula: ##STR10## wherein ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R 1 is straight chain C 1 -C 12 -alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight chain C 1 -C 12 -alkoxy; and (c) means for applying an electrical potential to said plate means.
Claim 9
Dependent Claim
77 words
An electro optical cell comprising: (a) two plate means; (b) a liquid crystal means disposed between the two plate means and including a compound of the formula: ##STR10## wherein ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R 1 is straight chain C 1 -C 12 -alkyl or when positioned on a 1,4-phenylene ring R 1 may also be straight chain C 1 -C 12 -alkoxy; and (c) means for applying an electrical potential to said plate means.
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |