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US4386007A
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Liquid crystalline naphthalene derivatives
Assignee: Merck Patent GmbH
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Filing: 1980-12-05
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Granted: 1983-05-31
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Expires: 2000-12-05
Abstract
Abstract Liquid crystalline naphthalene derivatives of the formula ##STR1## wherein ring A is 1,4-phenylene, trans-1,4-cyclohexylene or 1,4-cyclohex-1-enylene and ring system BC is 2,6-naphthylene, 3,4-dihydro-2,6-naphthylene or 1,2,3,4-tetrahydro-2,6-naphthylene, with the proviso that A is not 1,4-phenylene when BC is 2,6-naphthylene; and R 1 and R 2 , which are identical or different, are each alkyl of up to 8 C atoms or, when the rings to which they are bonded are aromatic, also can be alkoxy, alkanoyloxy or alkoxycarbonyloxy having up to 8 C atoms in each case; or one of R 1 and R 2 also can be CN, halogen, CF 3 or NO 2 are valuable components for liquid crystalline dielectrics.
Inventors
- 👤 Joachim Krause
- 👤 Michael Romer
- 👤 Ludwig Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/208; C07C13/00; C07C13/28; C07C13/32; C07C13/47; C07C17/10; C07C17/12; C07C17/16; C07C17/18; C07C17/26; C07C17/263; C07C22/00; C07C22/02; C07C22/04; C07C22/08; C07C25/00; C07C25/18; C07C25/22; C07C255/00; C07C29/00; C07C29/132; C07C29/136; C07C29/143; C07C29/145; C07C43/00; C07C43/02; C07C43/20; C07C43/21; C07C45/00; C07C45/45; C07C45/46; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/75; C07C49/00; C07C49/587; C07C49/657; C07C49/665; C07C49/67; C07C49/76; C07C49/82; C07C49/83; C07C51/00; C07C51/08; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/32; C09K19/322; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/10; C09K2019/324; C09K2019/325
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A naphthalene derivative of the formula ##STR27## wherein ring A is 1,4-phenylene and ring system BC is 3,4-dihydro-2,6-naphthylene or 1,2,3,4-tetrahydro-2,6-naphthylene; and R 1 is alkyl, alkoxy, or alkanoyloxy having up to 8 C atoms in each case, CN, or halogen; and R 2 is attached to the 2 position of ring system BC and is alkyl of up to 8 C atoms.
Claim 2
Dependent Claim
62 words
A naphthalene derivative of the formula ##STR27## wherein ring A is 1,4-phenylene and ring system BC is 3,4-dihydro-2,6-naphthylene or 1,2,3,4-tetrahydro-2,6-naphthylene; and R 1 is alkyl, alkoxy, or alkanoyloxy having up to 8 C atoms in each case, CN, or halogen; and R 2 is attached to the 2 position of ring system BC and is alkyl of up to 8 C atoms.
Claim 3
Dependent Claim
17 words
A naphthalene derivative of claim 1, wherein R 1 and R 2 contain a straight-chain alkyl moiety.
Claim 4
Dependent Claim
19 words
A liquid-crystalline dielectric, comprising two liquid-crystalline components, at least one of which is a naphthalene derivative of claim 1.
Claim 5
Dependent Claim
19 words
An electro-optical display element comprising a liquid-crystal cell, wherein the liquid-crystalline cell contains a liquid-crystalline dielectric of claim 3.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |