Patents by Inventor Marian A. Czerwiak

Marian A. Czerwiak 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 of manufacturing closure flanges
    Patent number: 3940845
    Abstract: A closure flange molded of synthetic plastic resin has an internally threaded cylindrical neck surrounded at one end by a circumferentially enlarged base. An annular groove is formed on the flange base for retention of a thermoplastic bonding element having electromagnetic conducting particles embedded therein. The flange manufacture includes making the bonding element up from an elongated strand into a complete annulus and securely inserting the annular bonding element within the groove in the flange base.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: March 2, 1976
    Assignee: American Flange & Manufacturing Co., Inc.
    Inventor: Marian A. Czerwiak