Patents by Inventor Gerard A. E. Blok

Gerard A. E. Blok 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).

  • Patent number: 4362323
    Abstract: Pipe with socket end provided with an annular groove chamber containing a sealing ring supported by a support ring, which support ring compresses the sealing ring less than the final inserted spigot end. The support ring closes the groove and the sealing ring or the closed space is provided with lubricant.
    Type: Grant
    Filed: February 24, 1981
    Date of Patent: December 7, 1982
    Assignee: Wabin B.V.
    Inventors: Bernhard Lodder, Jan P. van Dongeren, Gerard A. E. Blok