Patents by Inventor John D. Cawston

John D. Cawston 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).

  • Process for making thermally stable metal coated polymeric monofilament or yarn
    Patent number: 6045680
    Abstract: A polymeric yarn to be coated with electroless nickel is pretreated with an acid and a surfactant to render the yarn surfaces water wettable and not substantially mechanically degraded. All surfaces of yarn formed of polymeric monofilament fibers are coated with a layer of electroless nickel which can also include an electrolytic metal such as copper on the nickel. The yarn is passed through an electroless Ni aqueous bath under little or no tension so that the electroless Ni can coat all of the monofilament surface substantially uniformly. The nickel coated yarn then can be coated with electrolytic metal such as copper in an electrolytic metal plating step.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: April 4, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John D. Cawston, Merwin F. Hoover, Thomas F. Burke, Thomas H. Stearns