Patents by Inventor Helmut Hermann Froehlich

Helmut Hermann Froehlich 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).

  • Powdered cleaning composition of urea-formaldehyde
    Patent number: 4013594
    Abstract: A powdered cleaning composition particularly effective in removing soil from carpets comprising solid polymeric urea-formaldehyde particles of 10 to 105 microns in size and a solvent chosen from water, high boiling hydrocarbon or chlorinated hydrocarbon solvents, C.sub.1 to C.sub.4 aliphatic alcohols and mixtures of these.
    Type: Grant
    Filed: January 16, 1974
    Date of Patent: March 22, 1977
    Assignee: E. I. Du Pont de Nemours and Co.
    Inventors: Helmut Hermann Froehlich, William Jacob Lautenberger