Patents by Inventor Yvo Leest

Yvo Leest 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 environmentally protecting a pipeline
    Patent number: 5482087
    Abstract: A method of covering a joint between pipelines comprises installing a heat recoverable polymer sheet coated on its inner surface with a hot-melt adhesive comprising a mixture of 25 to 40 parts by weight of a polyethylene alkyl acrylate terpolymer containing maleic anhydride and having a melt flow index as determined according to ASTM D1238-70 of at least 40, and 25 to 70 parts by weight of a polyethylene alkyl acrylate copolymer having a melt flow index as determined according to ASTM D1238-70 of at least 40.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: January 9, 1996
    Assignees: N.V. Raychem S.A.
    Inventors: Noel M. M. Overbergh, Yvo Leest