Patents by Inventor Richard W. Walton

Richard W. Walton 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).

  • Automated control for a two-directional pump
    Patent number: 4482345
    Abstract: A controller for a two-directional air pump, of the type used in performing medical experiments is described. The controller includes a level sensing apparatus which is used to initiate an electric signal which controls a pneumatic solenoid which toggles the two-directional pump. Using the apparatus, the Doluisio technique may be performed automatically.
    Type: Grant
    Filed: March 16, 1982
    Date of Patent: November 13, 1984
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Wing-Sun Chow, Richard W. Walton, Donna A. D'Stefan
  • Controlled release tablet
    Patent number: 4252786
    Abstract: The rate of release of medicament from a controlled release tablet having a polymeric vinylpyrrolidonecarboxyvinyl hydrophilic core is improved by coating the medicament-containing core with a substantially insoluble rupturable film which is water permeable.
    Type: Grant
    Filed: November 16, 1979
    Date of Patent: February 24, 1981
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Aaron L. Weiss, Richard W. Walton, Albert E. de Lorimier