Patents by Inventor Rolf Peter Herr

Rolf Peter Herr 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).

  • Coumarin and quinolinone derivatives for the production of orienting layers for liquid crystals
    Patent number: 6201087
    Abstract: A polymer having the formula wherein M1 and M2 signify monomer units for homo- or copolymers. “x” and “y” indicate the mole fractions of the comonomers, with in each case 0<x≦1 and 0≦y<1 and x+y=1. The symbol “p” signifies 4 to 30,000 and “S1” and “S2” signify spacer units. “Q1” signifies a structural unit of the formula —A—(Z1—B)z—Z2— and “Q2” signifies a structural unit of the formula —A—(Z1—B)zR1. “A” and “B” each independently signify pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,4—Cyclohexylene,1,3-dioxane-2,5-diyl or optionally substituted 1,4-phenylene.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: March 13, 2001
    Assignee: Rolic AG
    Inventors: Rolf Peter Herr, François Herzog, Andreas Schuster