Patents by Inventor Robert H. Cheek

Robert H. Cheek 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).

  • Cleaning composition and method
    Patent number: 4507155
    Abstract: A cleaning composition particularly suited for removing dried printing ink residue from a substrate is described comprising a chlorinated hydrocarbon liquid, a petroleum distillate, an aliphatic alcohol and aqueous ammonia.
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: March 26, 1985
    Inventor: Robert H. Cheek