Patents by Inventor Hwason Goddard

Hwason Goddard 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 manufacturing sutures from copolymers of glycolide and E-caprolactone
    Patent number: 5718716
    Abstract: We have discovered a process for producing a suture from copolymers of glycolide and .epsilon.-caprolactone comprising the steps of (a) extruding a melted copolymer of a glycolide and .epsilon.-caprolactone resin through an orifice and rapidly quenching the melted copolymer resin to produce a filament; (b) drawing the filament in the range of from about 4.times. to about 7.5.times. to produce a singly drawn filament; (c) drawing the singly drawn filament in the range of form about 1.times. to about 3.times. in a first heated zone being maintained at a temperature in the range of from about 150.degree. F. to about 450.degree. F., to form a doubly drawn filament; (d) shrinking the doubly drawn filament in the range of from about 0.75 percent to about 0.98 percent, in a second heated zone being maintained at a temperature in the range of from about 100.degree. F. to about 400.degree. F., to form a relaxed filament then rack annealing the relaxed filament to form a glycolide/.epsilon.-caprolactone suture.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: February 17, 1998
    Assignee: Ethicon, Inc.
    Inventors: Hwason Goddard, Kenneth M. Keilman, Oliver S. Sosely