Patents by Inventor Robert Howard Schultz

Robert Howard Schultz 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).

  • Photoactivated bleaching process
    Patent number: 4033718
    Abstract: Detergent compositions containing particular species of sulfonated zinc phthalocyanine were found to be unexpectedly effective bleach photoactivators for removing stains from textiles. These species are principally tri- and tetra-sulfonates, especially the latter, with minor amounts of di-sulfonates permitted.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: July 5, 1977
    Assignee: The Procter & Gamble Company
    Inventors: Thomas Charles Holcombe, Robert Howard Schultz