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US4581155A
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Halogenopyrimidine derivatives
Assignee: JNC Corp
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Filing: 1984-03-26
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Granted: 1986-04-08
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Expires: 2004-03-26
Abstract
Abstract Novel compounds capable of improving various characteristics required for liquid crystal compositions when added to liquid crystal substances, and liquid crystal compositions containing the same are provided, which novel compounds are halogenopyrimidine derivatives expressed by the general formula ##STR1## wherein R 1 represents an alkyl group of 1 to 10 carbon atoms, R 2 represents a halogen atom of F, Cl of Br and l represents 1 or 2.
Inventors
- 👤 Yasuyuki Goto
- 👤 Tetsuya Ogawa
- 👤 Kisei Kitano
- 👤 Masahiro Fukui
- 👤 Shigeru Sugimori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:03
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; C09K19/3469
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
26 words
A pyrimidine derivative expressed by the formula ##STR4## wherein R represents an alkyl group of 1 to 10 carbon atoms and l represents 1 or 2.
Claim 2
Dependent Claim
26 words
A pyrimidine derivative expressed by the formula ##STR4## wherein R represents an alkyl group of 1 to 10 carbon atoms and l represents 1 or 2.
Claim 3
Dependent Claim
19 words
A 5-alkyl-2-(4-fluorophenyl)pyrimidine according to claim 1 wherein R represents methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl or octyl group.
Claim 4
Dependent Claim
19 words
A 5-alkyl-2-(4'-fluorobiphenylyl-4)pyrimidine according to claim 1 wherein R represents methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl or octyl group.
Claim 5
Dependent Claim
41 words
A liquid crystal composition comprising at least two components at least one of which is a pyrimidine derivative expressed by the formula ##STR5## wherein R represents an alkyl group of 1 to 10 carbon atoms and l represents 1 to 2.
Claim 6
Dependent Claim
41 words
A liquid crystal composition comprising at least two components at least one of which is a pyrimidine derivative expressed by the formula ##STR5## wherein R represents an alkyl group of 1 to 10 carbon atoms and l represents 1 to 2.
Claim 7
Dependent Claim
25 words
A composition according to claim 4 wherein said derivative is a 5-alkyl-2-(4-fluorophenyl)pyrimidine wherein R represents methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl or octyl group.
Claim 8
Dependent Claim
29 words
A composition according to claim 4 wherein said derivative is a 5-alkyl-2-(4'-fluorobiphenylyl-4)pyrimidine according to claim 7 wherein R represents methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl or octyl group.
References Cited (Backward Citations)
DE2257588A1
Cited
US3997536A
Cited
US4062798A
Cited
US4309539A
Cited
US4273929A
Cited
JPS55152777A
Cited
US4324455A
Cited
US4402849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |