Patents by Inventor Keith A. Kraft

Keith A. Kraft 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).

  • Electrophotographic transfer process for transferring toner image onto carbonless paper
    Patent number: 5991588
    Abstract: Carbonless papers manufactured as grain-short paper and wherein the grain direction is parallel to the direction of feed when a toner image is transferred upon in electrophotographic copiers, copier/duplicators, and laser printers results in reduced paper jams, reduced paper curl, and allows the use of lower basis weight papers and the use of non-xerographic grade papers than that normally used in electrophotography.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: November 23, 1999
    Assignee: Imation Corp.
    Inventor: Keith A. Kraft
  • Carbonless paper printable in electrophotographic copiers
    Patent number: 5084433
    Abstract: A carbonless paper construction for imaging via electrophotographic copiers comprising microcapsules encapsulating solvents of dialkyl esters of aliphatic dibasic organic acids, polyglycol ethers and alkyl ethers of monobasic aromatic acids.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: January 28, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Keith A. Kraft
  • Carbonless paper printable in electrostatic copiers
    Patent number: 4906605
    Abstract: A carbonless copy paper for imaging via electrostatic copiers comprising a paper stock having a basis weight greater than about 18 pounds per ream and containing on at least a portion of a surface thereof a stilt particle-free composition comprising microcapsules, at least 50 volume percent thereof having a size no greater than about 12 microns and at least 95 percent by volume thereof having a size no greater than about 18 microns.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: March 6, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Keith A. Kraft