Patents Examined by Thurlow Jeffery
  • Method of manufacturing a syntactic sleeve for insulating a pipeline
    Patent number: 4900488
    Abstract: A spincasting technique for forming a syntactic insulation layer around a pipeline includes rotating a drum while or after injecting components for forming syntactic insulation material into said drum. In this manner a syntactic material is formed in which larger, low density, microspheres are biased towards the inner surface of the insulation layer.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: February 13, 1990
    Assignee: Shell Oil Company
    Inventors: Michael H. Collins, Alan R. Lyle