Patents by Inventor Michael Maltman

Michael Maltman 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).

  • Water injection choke valve
    Patent number: 4825895
    Abstract: A choke valve for use on water injection wells is disclosed. The valve comprises a body, a sliding sleeve, in the body, a boss shaped plug, and a means for urging the sliding sleeve against the plug. The fluid path through the valve is largely straight, reducing wear on the valve, and the valve is devoid of screwed fittings.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: May 2, 1989
    Assignee: Chevron Research Company
    Inventor: Michael Maltman