Patents by Inventor Joseph A. Wiese, Jr.

Joseph A. Wiese, Jr. 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).

  • Copying in color
    Patent number: 4006018
    Abstract: A process is described for performing color separations from a light-image of a colored original and for separately printing corresponding color separation images in registry onto a print sheet to provide a full color reproduction. The printing step is accomplished by thermographic dry image forming techniques.
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: February 1, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Joseph A. Wiese, Jr.
  • Reduced styryl dyes
    Patent number: 3974147
    Abstract: Dihydroheterocyclic amines having a N-hydrocarbyl substitution and a 2-(or 4-) (omega-(nuclearly substituted cyclic)) vinylenyl substitution are described. There compounds are oxidized in an acidic environment to produce styryl dyes.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: August 10, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: George V. D. Tiers, Joseph A. Wiese, Jr.