Patent US4651441A successfully refreshed from Google Patents.
Patent US4831143A successfully refreshed from Google Patents.
US4831143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrimidine compound
Assignee: Adeka Corp
•
Filing: 1987-12-22
•
Granted: 1989-05-16
•
Expires: 2007-12-22
Abstract
Abstract The present invention discloses an optically active pyrimidine compound represented by the following general formula: ##STR1## wherein m is 3 to 14 n is 4 to 18; p is 3 to 5; and *C represents an asymmetric carbon atom. The pyrimidine compound of the present invention is a liquid crystal compound useful as an electrooptic element wherein the response of the ferroelectric liquid crystal to an electric field is utilized.
Inventors
- 👤 Toshihiro Shibata
- 👤 Masaki Kimura
- 👤 Norio Kurosawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:31
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
An optically active pyrimidine compound represented by the following general formula : ##STR7## wherein m is 3 to 14; n is 4 to 18; p is 3 to 5; and *C represents an asymmetric carbon atom.
Claim 2
Dependent Claim
36 words
An optically active pyrimidine compound represented by the following general formula : ##STR7## wherein m is 3 to 14; n is 4 to 18; p is 3 to 5; and *C represents an asymmetric carbon atom.
Claim 3
Dependent Claim
12 words
A pyrimidine compound as set forth in claim 1, which is 2-(4-(4-methyloctoxy)-phenyl)-5-n-decylpyrimidine.
Claim 4
Dependent Claim
12 words
A pyrimidine compound as set forth in claim 1, which is 2-(4-(4-methyloctoxy)-phenyl)-5-n-octylpyrimidine.
Claim 5
Dependent Claim
12 words
A pyrimidine compound as set forth in claim 1, which is 2-(4-(4-methyldodecyloxy)-phenyl)-5-n-octylpyrimidine.
Claim 6
Dependent Claim
12 words
A pyrimidine compound as set forth in claim 1, which is 2-(4-(6-methyldecyloxy)-phenyl)-5-n-octylpyrimidine.
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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |