Patents by Inventor Lucien Guillemin

Lucien Guillemin 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 repairing or protecting an end of a metal tube in a heat exchanger and sleeve for implementing same
    Patent number: 4960650
    Abstract: To repair a corroded region of the end of a heat exchanger tube, a sleeve is inserted, then expanded into the tube both in the area of the tube sheet and beyond the corroded area, then local welds are made in each of the expanded regions. Thereafter, the end of the sleeve is expanded against the tube in a region inside the tube sheet and above the local weld.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: October 2, 1990
    Assignees: Societe Anonyme, Electricite De France
    Inventors: Gilbert Vigneron, Jean Bezier, Thong Nguyen-Thanh, Pierre Vidal, Guy Zacharie, Lucien Guillemin