Patents by Inventor Harry W. Margraf

Harry W. Margraf 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).

  • Siver-heparin-allantoin complex
    Patent number: 3932627
    Abstract: Silver-heparin-allantoin complex and process for making same is disclosed. The silver-heparin-allantoin complex is prepared by a novel process in either powder or solution form. The silver-heparin-allantoin complex provides a non-thrombogenic, self-sterilizing compound for application to polymeric devices such as prosthetic values, small diameter arterial grafts and the like to avoid thrombus formation and infection of polymeric devices.
    Type: Grant
    Filed: February 4, 1974
    Date of Patent: January 13, 1976
    Assignee: Rescue Products, Inc.
    Inventor: Harry W. Margraf