Patents by Inventor Christopher R. Hoffman

Christopher R. Hoffman 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: 6497941
    Abstract: An ink jet recording element comprising a support having thereon an image-receptive layer capable of accepting an ink jet image comprising an open-pore membrane of a mixture of a water-insoluble polymer and a water-absorbent polymer, the mixture containing at least about 25% by weight of the water-absorbent polymer, the image-receiving layer being made by dissolving the mixture of polymers in a solvent mixture, the solvent mixture comprising at least one solvent which is a good solvent for the water-insoluble polymer and at least one poor solvent for the water-insoluble polymer, the poor solvent having a higher boiling point than the good solvent, coating the dissolved mixture on the support, and then drying to remove approximately all of the solvents to obtain the open-pore membrane.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: December 24, 2002
    Assignee: Eastman Kodak Company
    Inventors: Christine Landry-Coltrain, David M. Teegarden, Linda M. Franklin, Christopher R. Hoffman
  • Patent number: 6464351
    Abstract: An ink jet printing method, comprising the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with an ink jet recording element comprising a support having thereon an image-receptive layer capable of accepting an ink jet image comprising an open-pore membrane of a mixture of a water-insoluble polymer and a water-absorbent polymer, the mixture containing at least about 25% by weight of the water-absorbent polymer, the image-receiving layer being made by dissolving the mixture of polymers in a solvent mixture, the solvent mixture comprising at least one solvent which is a good solvent for the water-insoluble polymer and at least one poor solvent for the water-insoluble polymer, the poor solvent having a higher boiling point than the good solvent, coating the dissolved mixture on the support, and then drying to remove approximately all of the solvents to obtain the open-pore membrane; C) loading the printer with an ink jet ink composition; and D) prin
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: October 15, 2002
    Assignee: Eastman Kodak Company
    Inventors: Christine Landry-Coltrain, David M. Teegarden, Christopher R. Hoffman, Linda M. Franklin