Patents by Inventor Russell R. Isbrandt

Russell R. Isbrandt 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: 5026606
    Abstract: Film suitable for thermal imaging comprising (1) a substrate formed from a flexible material, (2) a layer of thermally imageable material applied to at least one major surface of the substrate, and (3) a release coating overlying the layer of imageable material, the release coating being the hydrosilation product of (a) a polyorganohydrosiloxane, (b) an ethylenically-unsaturated perfluoropolyether monomer, and (c) an effective amount of a hydrosilation catalyst. Preferably, the film is transparent to visible light. The coating is sufficiently flexible so that the film bearing it can be imaged in commercially available infrared copying machines. Toner powder from plain paper copies will not stick to this coating when the imaging film is processed in a conventional thermal imaging apparatus.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: June 25, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Russell R. Isbrandt, Chung I. Young
  • Patent number: 4567133
    Abstract: Thermally imageable film comprising a polymeric substrate, a layer of imageable material coated over at least one major surface thereof, and a release coating coated over the layer of imageable material. The release coating is an organopolysiloxane applied from a composition which is curable at temperatures below about 70.degree. C. with a curing exposure time of under about 3 minutes, thereby preventing adverse effects upon the layer of imageable material.
    Type: Grant
    Filed: June 26, 1984
    Date of Patent: January 28, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Russell R. Isbrandt, Chung I. Young
  • Patent number: 4482608
    Abstract: Coating for infrared transparency films and thermally imageable films and films prepared with such coating. The coating comprises a copolymer formed from (a) at least one fluorocarbon monomer and (b) at least one monomer which imparts hardness to the copolymer. The coating serves to prevent the transfer of toner powder from an original which is in actuality an electrophotographic copy to the transparency film. The copolymer may contain from about 12 percent to about 85 percent fluorocarbon monomer, the remainder being the monomer which imparts hardness to the coating. Suitable monomers for imparting hardness to the copolymer include acrylates, methacrylates, acrylamides, methacrylamides, acrylonitriles, methacrylonitriles, and styrenes.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: November 13, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Russell R. Isbrandt, Robert D. Lowery
  • Patent number: 4423139
    Abstract: Synergistic combinations for use in stabilizing thermographic imaging systems comprise (1) one or more aromatic compounds which form quinones, diimines, or quinonimines upon oxidation in combinaton with (2) 1-phenyl-3-pyrazolidinone, or derivatives or 1-phenyl-3-pyrazolidinone. When used in a thermographic imaging system comprising a nitrate salt, and a leuco dye in a binder these stabilizing combinations prevent oxidation and premature reaction of the leuco dye.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: December 27, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Russell R. Isbrandt, Robert D. Lowrey