Patents by Inventor Michael K. Chambers

Michael K. Chambers has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5055224
    Abstract: A liquid crystal phase consisting of at least three components A, B and C, each of which contains one or more compounds, wherein component A has a viscosity of at most about 25 mPa.s at 20.degree., a clearing point of at most 130.degree. and a dielectric anisotropy between about -2 and about +2, component B has a dielectric anisotropy above about +8, component C has a clearing point of more than 130.degree. and a dielectric anisotropy between about -2 and about +2, characterized in that component A contains at least one compound of the formula III ##STR1## in which R.sup.1 is alkyl of 1 to 12 C atoms, in which in addition one or two non-adjacent CH.sub.2 groups can be replaced by O atoms, --CO--, --O--CO--, --CO--O-- and/or --CH.dbd.CH-- groups,R.sup.2 has one of the meanings of R.sup.1, ##STR2## Z.sup.1 is --CO--O--, --O--CO-- or --CH.sub.2 CH.sub.2 --, o is 1 or, if A.sup.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: October 8, 1991
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Ian C. Sage, Michael K. Chambers
  • Patent number: 4886621
    Abstract: Liquid crystal phases containing components of the formulae I and III ##STR1## have an acceptable combination of threshold steepness, viewing angle and temperature dependence at a low threshold voltage.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: December 12, 1989
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Ian C. Sage, Michael K. Chambers, Reinhard Hittich, Georg Weber