Patents by Inventor Charles C. Versfelt

Charles C. Versfelt 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).

  • Absorbable polymer-drug compounds and method for making same
    Patent number: 4328204
    Abstract: Drugs with active hydrogen containing groups are reacted with .alpha.-polyester homopolymers and copolymers to form compounds which slowly absorb and release the drug when implanted in animal tissue.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: May 4, 1982
    Assignee: Ethicon, Inc.
    Inventors: David Wasserman, Charles C. Versfelt, Dowon Hahn, Michael P. Wachter
  • Synthetic absorbable surgical devices of poly-dioxanone
    Patent number: 4052988
    Abstract: Synthetic absorbable sutures and other surgical devices are prepared from polymers of p-dioxanone and 1,4-dioxepan-2-one, and alkyl substituted derivatives thereof. Monofilament sutures of oriented fibers are characterized by good tensile and knot strength and a high level of flexibility and softness. The sutures have good in vivo strength retention and are slowly absorbed without significant tissue reaction.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: October 11, 1977
    Assignee: Ethicon, Inc.
    Inventors: Namassivaya Doddi, Charles C. Versfelt, David Wasserman