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US4490278A Expired / Lapsed US ⏱️ 0.0 years remaining

Liquid crystal substituted trans-4-n-alkylcyclohexanes and subst.-3-subst.-benzoyloxy-[trans-4-n-alkylcyclohexane]s

Assignee: Werk fuer Fernsehelektronik im VEB Kombinat Mikroelektronik VEB
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Filing: 1980-09-22
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Granted: 1984-12-25
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Expires: 2000-09-22
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Abstract

Abstract The invention relates to liquid crystal nematic substances for electro-optical devices for the modulation of light, for the reproduction of numerals, signs and images as well as an orienting medium for spectroscopy and gas chromatography. It was found that compounds containing two or three rings, connected by carboxyl groups are new liquid crystal nematic substances of the general formula ##STR1## where R 1 =C n H 2n+1 , CN; R 2 =C m H 2m+1 , CN;R 3 =H, CH 3 , C 2 H 5 Cl, Br; x=0 or 1; m,n=numbers from 1 to 10 are suitable for electro-optical arrangements for the modulation of transmitted or reflected light as well as for the reproduction of numeral signals and images, and further, as an orienting medium for spectroscopy and gas chromotography. Other liquid crystal substances or non-liquid crystalline substances, particularly dyes, may be added to the substances according to the invention.

Inventors

  • 👤 Herrmann Schubert
  • 👤 Hans-Joachim Deutscher
  • 👤 Horst Kresse
  • 👤 Dietrich Demus
  • 👤 Heinz Altmann
  • 👤 Marlies Korber
  • 👤 Ute Bottger

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 14:35
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C07; C07C; C07C29/00; C07C29/09; C07C29/095; C07C29/17; C07C29/19; C07C29/20; C07C29/74; C07C29/76; C07C29/80; C07C29/88; C07C29/92; C07C2601/00; C07C2601/12; C07C2601/14

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 44 words
Liquid crystal 4-trans-4-n-alkylcyclohexanoyloxy-trans-n-alkyl-cyclohexanes and/or 4-trans-4-n-alkylcyclohexanoyloxy-3-subst.-benzoyloxy-trans-4-n-alkylcyclohexanes respectively having the general formula ##STR12## where R 1 =C n H 2n+1 ; R 2 =C m H 2m+1 ; R 3 =H,CH 3 , CH 2 H 5 , Cl, Br and X=1; m, n=1 to 10.
Claim 2
Dependent Claim 44 words
Liquid crystal 4-trans-4-n-alkylcyclohexanoyloxy-trans-n-alkyl-cyclohexanes and/or 4-trans-4-n-alkylcyclohexanoyloxy-3-subst.-benzoyloxy-trans-4-n-alkylcyclohexanes respectively having the general formula ##STR12## where R 1 =C n H 2n+1 ; R 2 =C m H 2m+1 ; R 3 =H,CH 3 , CH 2 H 5 , Cl, Br and X=1; m, n=1 to 10.
Claim 3
Dependent Claim 10 words
The liquid crystal according to claim 1 which is ##STR13##
Claim 4
Dependent Claim 10 words
The liquid crystal according to claim 1 which is ##STR14##
Claim 5
Dependent Claim 10 words
The liquid crystal according to claim 1 which is ##STR15##
Claim 6
Dependent Claim 10 words
The liquid crystal according to claim 1 which is ##STR16##
Claim 7
Dependent Claim 10 words
The liquid crystal according to claim 1 which is ##STR17##
Claim 8
Dependent Claim 10 words
The liquid crystal according to claim 1 which is ##STR18##
Claim 9
Dependent Claim 10 words
The liquid crystal according to claim 1 which is ##STR19##
Claim 10
Dependent Claim 12 words
A liquid crystalline mixture comprising liquid crystal subst.-benzolyloxy-trans-4-n-alkylcyclohexanes according to claim 1.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-12-25 1988-06-25 1988-12-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-12-25 1992-06-25 1992-12-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-12-25 1996-06-25 1996-12-25 $7700.00 Window Closed / Lapsed

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