US4082686A
Expired / Lapsed
US
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Liquid crystal composition
Assignee: Panasonic Holdings Corp
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Filing: 1975-08-04
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Granted: 1978-04-04
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Expires: 1995-08-04
Abstract
Abstract A nematic liquid crystal composition comprising at least one of the compounds of the formula, ##STR1## wherein X is methyl or chlorine, Y is a normal-C n H 2n+1 group wherein n is an integer of 1 to 8, provided that when X is methyl n is an integer of 2 to 8, and when X is chlorine n is an integer of 1 to 6. The nematic liquid crystal composition is operable over a wide temperature range.
Inventors
- 👤 Hiroshi Tatsuta
- 👤 Masakazu Fukai
- 👤 Hiroaki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:16
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A nematic liquid crystal composition comprising at least one of the compounds having the formula, ##STR99## wherein X is methyl and Y is a normal - C n H 2n+1 group wherein n is an integer of 2 to 8, and at leat one of the compounds selected from the group consisting of the compounds having the general formula, ##STR100## wherein in the compound A, R 1 is an alkyl group having 1 to 3 carbon atoms and R 2 is an alkyl group having 2 to 5 carbon atoms; and in the compound B, R 3 is an alkyl group having 1 to 4 carbon atoms and R 4 is an alkyl group having 3 to 10 carbon atoms.
Claim 2
Dependent Claim
120 words
A nematic liquid crystal composition comprising at least one of the compounds having the formula, ##STR99## wherein X is methyl and Y is a normal - C n H 2n+1 group wherein n is an integer of 2 to 8, and at leat one of the compounds selected from the group consisting of the compounds having the general formula, ##STR100## wherein in the compound A, R 1 is an alkyl group having 1 to 3 carbon atoms and R 2 is an alkyl group having 2 to 5 carbon atoms; and in the compound B, R 3 is an alkyl group having 1 to 4 carbon atoms and R 4 is an alkyl group having 3 to 10 carbon atoms.
Claim 3
Dependent Claim
19 words
A nematic liquid crystal composition according to claim 1, which comprises one of the compounds of the formulas, ##STR101##
Claim 4
Dependent Claim
19 words
A nematic liquid crystal composition according to claim 1, which comprises one of the compounds of the formulas, ##STR102##
Claim 5
Dependent Claim
19 words
A nematic liquid crystal composition according to claim 1, which comprises one of the compounds of the formula, ##STR103##
Claim 6
Dependent Claim
41 words
A nematic liquid crystal composition according to claim 1, which comprises one of the compounds of the formula, ##STR104## wherein X is methyl and Y is a normal-C n H 2n+1 group, wherein n is an integer of 2 or 3.
References Cited (Backward Citations)
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US3970579A
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US3838059A
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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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |