Patents by Inventor Jeffrey G. Southwick

Jeffrey G. Southwick 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).

  • Process for the reduction of diene polymer hot melt adhesive color
    Patent number: 5145896
    Abstract: A method of reducing the color of a hot melt adhesive formulation comprising a polymer of a conjugated diene which comprises adding to the formulation an amount of an alkyltin compound selected from the group consisting of mercaptides, mercaptocarboxylates, and carboxylates sufficient to reduce color formation.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: September 8, 1992
    Assignee: Shell Oil Company
    Inventor: Jeffrey G. Southwick
  • Block copolymer dispersions and process to prepare block copolymer dispersions
    Patent number: 5141986
    Abstract: A process to produce a stable suspension of block copolymer particles in a water medium, and a stable suspension of block copolymer particles in a water medium is provided. The block copolymer is a polar functional group-containing vinyl aromatic/conjugated diolefin block copolymer which may optionally be hydrogenated. The use of C.sub.15 to C.sub.24 linear alkyl aromatic sulfonates has been found to be critical in preparation of these stable dispersions.
    Type: Grant
    Filed: December 12, 1991
    Date of Patent: August 25, 1992
    Assignee: Shell Oil Company
    Inventors: Jeffrey G. Southwick, Kirk H. Raney, John K. Borchardt
  • Block copolymer dispersions and process to prepare block copolymer dispersions
    Patent number: 5120765
    Abstract: A process to produce a stable suspension of block copolymer particles in a water medium, and a stable suspension of block copolymer particles in a water medium is provided. The block copolymer is a polar functional group--containing vinyl aromatic/conjugated diolefin block copolymer which may optionally be hydrogenated. The use of C.sub.15 to C.sub.24 linear alkyl aromatic sulfonates has been found to be critical in preparation of these stable dispersions.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: June 9, 1992
    Assignee: Shell Oil Company
    Inventors: Jeffrey G. Southwick, Kirk H. Raney, John K. Borchardt
  • Polymer-thickened aqueous solutions containing a mercaptobenzothiazole
    Patent number: 4925578
    Abstract: Improved solutions are proposed for an oil recovery process in which oil is displaced by a viscous alkaline aqueous solution. The improved aqueous alkaline solution contains a water-thickening partially hydrolyzed polyacrylamide polymer and a stabilizer consisting essentially of a 2-mercaptobenzothiazole in the presence of a sulfur-containing oxygen scavenger. A readily oxidizable alcohol or glycol may also be included.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: May 15, 1990
    Assignee: Shell Oil Company
    Inventors: Jeffrey G. Southwick, Richard C. Nelson
  • Stabilizing polymer-thickened aqueous alkaline solutions with a mercaptobenzothiazole
    Patent number: 4795575
    Abstract: An oil recovery process in which oil is displaced by a viscous alkaline aqueous solution is improved by using such an aqueous alkaline solution containing a water-thickening polymer partially hydrolyzed polyacrylamide polymer and a stabilizer consisting essentially of a 2-mercaptobenzothiazole in the presence of a sulfur-containing oxygen scavenger. A readily oxidizable alcohol or glycol may also be included.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: January 3, 1989
    Assignee: Shell Oil Company
    Inventors: Jeffrey G. Southwick, Richard C. Nelson
  • Process for preparing alkaline flooding solutions that avoid silica dissolution
    Patent number: 4458755
    Abstract: In injecting an aqueous alkaline liquid to displace an acidic oil within a subterranean reservoir, damage due to dissolving silica in or around a well is avoided by providing the alkaline solution with an amount of soluble silicate particularly suited for the reservoir conditions.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: July 10, 1984
    Assignee: Shell Oil Company
    Inventors: Jeffrey G. Southwick, Richard C. Nelson
  • Moderated borohydride-induced reservoir dewatering
    Patent number: 4448253
    Abstract: A productivity-impairing water-block is removed from a subterranean reservoir by injecting an aqueous alkaline solution containing both an alkali metal borohydride and an acid-yielding reactant which is relatively slowly reactive.
    Type: Grant
    Filed: March 10, 1983
    Date of Patent: May 15, 1984
    Assignee: Shell Oil Company
    Inventors: Jeffrey G. Southwick, Lee N. Morgenthaler