Patents by Inventor Karl C. Zerfass

Karl C. Zerfass 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).

  • Method for covering a length of pipe
    Patent number: 4535526
    Abstract: Disclosed is a laminated foil which is free from elastic memory, comprising a carrier layer of rigid PVC, polyethylene or polypropylene, and an aluminum layer bonded thereto. Also disclosed are a process of using the foil to wrap pipes and several articles of manufacture made from the foil.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: August 20, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Karl C. Zerfass, Martin Urban