Patents by Inventor Chunglee Hank Yih

Chunglee Hank Yih 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).

  • Coating method for pipe having weld bead
    Patent number: 8038829
    Abstract: Method of coating pipe having a raised weld bead. Curable resin polymer is applied to the pipe and allowed to bond to form a cured or partially cured polymer layer on the pipe. Powder form adhesive composition is applied on the polymer layer while hot, with fusion into a film bonding to the polymer. Powder form polyolefin is applied to the adhesive while hot with fusion into a film bonding to the adhesive to form a powder-based coating. Following forming of the powder-based coating, the pipe is cooled from the inside. An outer polyolefin covering is bonded to the powder-based coating and the pipe cooled to ambient temperature. This procedure can avoid voids, cavities or pinholes forming in the coating adjacent the weld bead.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: October 18, 2011
    Assignee: ShawCor Ltd.
    Inventors: Robert E. Steele, Dennis T. H. Wong, Peter Singh, Chunglee Hank Yih
  • COATING METHOD FOR PIPE HAVING WELD BEAD
    Publication number: 20090165944
    Abstract: Method of coating pipe having a raised weld bead. Curable resin polymer is applied to the pipe and allowed to bond to form a cured or partially cured polymer layer on the pipe. Powder form adhesive composition is applied on the polymer layer while hot, with fusion into a film bonding to the polymer. Powder form polyolefin is applied to the adhesive while hot with fusion into a film bonding to the adhesive to form a powder-based coating. Following forming of the powder-based coating, the pipe is cooled from the inside. An outer polyolefin covering is bonded to the powder-based coating and the pipe cooled to ambient temperature. This procedure can avoid voids, cavities or pinholes forming in the coating adjacent the weld bead.
    Type: Application
    Filed: February 22, 2007
    Publication date: July 2, 2009
    Applicant: SHAWCOR LTD.
    Inventors: Robert E. Steele, Dennis T.H. Wong, Peter Singh, Chunglee Hank Yih