Patents by Inventor Phyllis M. Harnack

Phyllis M. Harnack 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).

  • Cathode ray tube device with improved coolant
    Patent number: 5115163
    Abstract: A cathode-ray tube device for generating a bright light spot is provided, in the path of radiation, a container with a coolant from the cathode-ray tube containing a solution of about 0.5-2.0% by weight of a surfactant selected from the group consisting of sorbitan esters of fatty acids of 12-18 carbons, polyoxyethylene derivatives thereof and ethers of polyoxyethylene in polyethylene glycol 200-300 all of said container in contact with said solution being formed of polymethyl methacrylate and all surfaces of which container are in contact with said solution are provided with a thin layer of silicon dioxide.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: May 19, 1992
    Assignee: North American Philips Corporation
    Inventors: Brian J. Fitzpatrick, Phyllis M. Harnack, Scott H. Baker
  • Method of reducing surface damage in KTP optical waveguides
    Patent number: 5015328
    Abstract: A method for producing an optical waveguide which comprises imersing a wafer of K.sub.1-x Rb.sub.x TiOMO.sub.4, wherein 0.ltoreq.x.ltoreq.1, and M is P or As, for 1-64 hours in molten potassium nitride at 400.degree.-500.degree. C., followed by washing and immersing in a molten salt of Rb, Cs, or Tl at 240.degree.-335.degree. C., thereby causing the Rb, Cs, or Tl to replace the K or Rb cations. The resultant product has reduced mechanical damage to the waveguide surface.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: May 14, 1991
    Assignee: North American Philips Corporation
    Inventors: Brian J. Fitzpatrick, Phyllis M. Harnack
  • Cathode ray tube device with improved color filtering system
    Patent number: 4617490
    Abstract: Halos occurring around bright light spots generated by cathode ray tube devices in which the light emitted by the tubes is filtered by filtering solutions are significantly reduced by the addition of cinnamic alcohol and/or cinnamaldehyde to the solution.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: October 14, 1986
    Assignee: North American Philips Corporation
    Inventors: Brian J. Fitzpatrick, Phyllis M. Harnack
  • Method for purification of II-VI crystals
    Patent number: 4244753
    Abstract: A method for purification of Group II-VI crystals by contacting with a zinc melt.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: January 13, 1981
    Assignee: North American Philips Corporation
    Inventor: Phyllis M. Harnack