Patents Represented by Attorney A. Kate Huffmann
  • Patent number: 4886499
    Abstract: The portable appliance is of use for the subcutaneous or intradermal injection of a liquid formulation of an active principle and it comprises in combination: a supply vessel for the formulation; an injection needle adapted to communicate with the vessel; pump means for emptying the vessel through the injection needle; securing means for securing the appliance to an appropriate part of the patient's body; and needle-driving means for shooting the injection needle into the patient's skin.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: December 12, 1989
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Giorgio Cirelli, Hans Steffen, Christian Surber
  • Patent number: 4783280
    Abstract: There is described a liquid crystalline mixture for electro-optical devices which are operated according to the two-frequency matrix addressing procedure. The mixture consists of three components A, B and C, each of which contains one or more compounds. Component A has a viscosity of at most about 40 cp, a clearing point of at least about C. and a dielectric anisotropy between about -2 and about +1. Component B has a dielectric anisotropy below about -2 both above and below the cross-over frequency of the total mixture and component C has a dielectric anisotropy above about +10, a clearing point of at least about C. and there is a cross-over frequency in the total mixture of at most about 15 kHz at C. Novel compounds for such mixtures and their manufacture and use are also described. The novel mixtures make possible especially high multiplex rates and short response times.
    Type: Grant
    Filed: May 20, 1987
    Date of Patent: November 8, 1988
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Martin Petrzilka, Martin Schadt, Alois Villiger