Patents by Inventor Eric Rothwell

Eric Rothwell 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).

  • Secondary recovery of oil and polymers useful for this
    Patent number: 4088584
    Abstract: Water soluble polymers suitable for use in water flooding during the secondary recovery of oil are described. They are made by a process comprising reacting high molecular weight polyacrylamide with formaldehyde. Processes of water flooding using the polymers are also described.
    Type: Grant
    Filed: December 3, 1974
    Date of Patent: May 9, 1978
    Assignee: Allied Colloids Limited
    Inventors: Graham Smalley, David A. Frost, Eric Rothwell
  • Process for settling red mud in the digestion of bauxite
    Patent number: 3975496
    Abstract: The invention provides novel water-soluble copolymers useful as flocculating agents, especially in flocculating the red mud formed during the Bayer process for the production of alumina from bauxite. The copolymers comprise anionic monomer units e.g. acrylic acid units in a mole percentage of less than 50% and acrylamide type units some of which are methylolated.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: August 17, 1976
    Assignee: Allied Colloids Limited
    Inventors: Graham Smalley, Eric Rothwell