Patents by Inventor Petrus A. Dierikx

Petrus A. Dierikx 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).

  • Gate valves
    Patent number: 5085403
    Abstract: The gate valve assembly forms a very efficient seal which incorporates a wedge-shaped valve body assembly having resilient valve-sealing elements which are made of such material as to be sensitive to destruction or detrimental effect from excess heat during manufacture of the gate valve.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: February 4, 1992
    Assignee: R.M.I. Holland B.V.
    Inventor: Petrus A. Dierikx