Patents by Inventor Lawrence J. Graen

Lawrence J. Graen 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 and apparatus for anchoring a well screen on a perforated mandrel of stainless steel
    Patent number: 5509483
    Abstract: A method and apparatus is described for anchoring a well screen on a stainless steel perforated mandrel without the use of welds in which cup-shaped members, each having a base and an annular wall, are positioned on the mandrel at each end of the screen with the walls of the cups extending partly over the screen and filling the annular cavities between the walls of the cups and the ends of the screen with a liquid adhesive epoxy to anchor the cups to the mandrel.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: April 23, 1996
    Assignee: Houston Well Screen Company
    Inventor: Lawrence J. Graen