Patents Represented by Attorney Patric C. Baker

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  • Recovery of bitumen from tar sands sludge using additional water
    Patent number: 4392941
    Abstract: A method is disclosed for the recovery of bitumen from a sludge. The sludge is diluted with water and subjected to high-shear agitation and aeration and the sludge settled to obtain an upper bitumen-containing froth layer and a lower sludge layer of reduced bitumen content. The recovery of bitumen is increased over that obtained with aeration and mixing with mild agitation or with aeration alone or with agitation alone.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: July 12, 1983
    Assignee: Suncor, Inc.
    Inventors: Robert B. Roth, Walter H. Seitzer
  • Polymeric antioxidant viscosity index improvers
    Patent number: 4098709
    Abstract: Polymers containing post-reacted hindered phenol anti-oxidant functionality as viscosity index (VI) improvers for high temperature service, particularly for lubricating oils used in diesel engines.
    Type: Grant
    Filed: June 10, 1977
    Date of Patent: July 4, 1978
    Assignee: Rohm and Haas Company
    Inventors: Richard H. Hanauer, Gordon L. Willette