Patents by Inventor Richard Alfred Parent

Richard Alfred Parent 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).

  • Method of dyeing hair with indolines, indoles and indazoles
    Patent number: 4013404
    Abstract: A method for dyeing hair and other keratinaceous materials with certain amino, hydroxy, methoxy and nitro-containing indoline, indole and indazole compounds, and combinations thereof, and keratinaceous fibers dyed therewith.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: March 22, 1977
    Assignee: American Cyanamid Company
    Inventors: Richard Alfred Parent, Frank Fred Loffelman