Patents by Inventor Ken C. Symes

Ken C. Symes 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).

  • Patent number: 4571422
    Abstract: Polysaccharide is provided as a fluid composition that is a dispersion of the polysaccharide in oil and that contains a dispersion promoter selected from surfactants and stabilizers. The dispersion is generally a stable flocculated dispersion. It is generally made by dispersing an aqueous polysaccharide solution having a consistency index of about 20,000 cps in oil in the presence of dispersion promoter and then drying the dispersion. The oil generally comprises volatile and non-volatile components such that the drying can be by azeotroping. The dispersion promoters are generally selected from amphiphatic copolymers and surfactants having HLB at 20.degree. C. above 6.5 but which serve as water in oil dispersing agents during the formation of the dispersion. Aqueous solutions of the polysaccharide can be made by dispersing the fluid composition in water. These aqueous solutions are of particular value in methods of enhanced oil recovery.
    Type: Grant
    Filed: May 14, 1984
    Date of Patent: February 18, 1986
    Assignee: Allied Colloids Limited'
    Inventors: Ken C. Symes, John Langley, Peter Flesher