Patents by Inventor Donald Lester Krause

Donald Lester Krause 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).

  • Mixture of binder materials for use in connection with a charge transport layer in a photoconductor
    Patent number: 4030923
    Abstract: This invention relates to an improvement in photoconductive compositions of layered electrophotographic plates and related electrophotographic processes and particularly in the charge transport layer thereof which includes a tri-aryl pyrazoline compound in conjunction with a binder material wherein the improvement comprises the use of a tri-aryl pyrazoline compound and a mixture of binder materials comprising about 3 to 25% by weight acrylic resin and about 75 to 97% by weight polycarbonate.
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: June 21, 1977
    Assignee: International Business Machines Corporation
    Inventors: Donald Lester Krause, Kenneth Dale Presley