Patents by Inventor James William Tipping

James William Tipping 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).

  • Two tank cleaning process using a contaminated cleaning mixture capable of forming an azeotrope
    Patent number: 3957531
    Abstract: Contaminated articles, especially printed circuit boards, are cleaned by immersing them in the sump compartment of a cleaning tank containing a boiling mixture of a halogenated hydrocarbon solvent, especially fluorochlorohydrocarbons containing two or three carbon atoms, having a high concentration of an organic solvent, especially isopropyl alcohol, followed by rinsing them in another boiling mixture containing a lower concentration of the organic solvent but at least equal to the organic solvent concentration of the azeotrope.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: May 18, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: James William Tipping, Bernard Patrick Whim