Patents by Inventor Owen Portwood

Owen Portwood 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).

  • Diquaternary compounds useful as bleach activators
    Patent number: 5705681
    Abstract: Diquaternary ammonium esters useful as bleach activators are disclosed as are bleach compositions comprising such an ester and peroxygen compound yield peroxide in solution.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: January 6, 1998
    Assignee: Witco Corporation
    Inventors: Philip H. Steiger, Shaun F. Clancy, Owen Portwood
  • Diquaternary compounds useful as bleach activators, and compositions containing them
    Patent number: 5662827
    Abstract: Disclosed are bleaching compositions comprising diquaternary ammonium esters which are useful as bleach activators with a peroxygen compound to yield peroxide in solution.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: September 2, 1997
    Assignee: Witco Corporation
    Inventors: Philip H. Steiger, Shaun F. Clancy, Owen Portwood
  • Diquaternary bleach activators and compositions containing them
    Patent number: 5399746
    Abstract: Diquaternary ammonium esters useful as bleach activators are disclosed, as are bleach compositions comprising such an ester and a peroxygen compound which yields peroxide in solution.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: March 21, 1995
    Assignee: Witco Corporation
    Inventors: Philip H. Steiger, Shaun F. Clancy, Owen Portwood
  • Ore dewatering process and compositions therefor
    Patent number: 4990264
    Abstract: The present invention is directed to a dewatering aid which functions unexpectedly efficiently in the dewatering of a particulate solids slurry, e.g. mineral ore concentrate or slurry, wherein a dewatering aid is added thereto followed by filtration of the slurry. Such improved dewatering results are achieved by adding to the mineral ore slurry, an effective amount of a dewatering aid comprising an alkoxylated C.sub.6 -C.sub.11 alkanol or alkanoic acid wherein alkoxylation is conducted with propylene oxide or butylene oxide.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: February 5, 1991
    Assignee: Sherex Chemical Company, Inc.
    Inventors: James G. Fuller, Owen Portwood, Joe W. Cotton
  • Process for preparing quaternary ammonium compounds
    Patent number: 4982000
    Abstract: The present invention is directed to a process for preparing a quaternary ammonium compound which comprises the reaction product of (a) a tertiary amine; (b) an alkylating agent characterized by the presence of a first member selected from the group consisting of hydroxyl and thiol radicals and a second member, a halogen atom, disposed on adjacent carbon atoms; and (c) an epoxy compound acting as an entraining reactant.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: January 1, 1991
    Assignee: Sherex Chemical Co., Inc.
    Inventors: Gary W. Earl, Owen Portwood
  • Liquid phase process for producing esters
    Patent number: 4724100
    Abstract: Esters are obtained from organic carboxylic acids and/or lower molecular weight esters thereof by a liquid phase reaction at temperatures of about 200.degree. C. to about 350.degree. C., pressures of about 50 psi to about 1800 psi, whereby water and/or alcohol by-product is removed during the reaction of the acid and/or lower molecular weight ester to the ester to thereby obtain the desired ester.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: February 9, 1988
    Assignee: Sherex Chemical Company, Inc.
    Inventors: Robert M. Gilbert, Owen Portwood, Gary W. Earl
  • Alkoxy derivatives of hydroxy aminimides
    Patent number: 3985807
    Abstract: Compounds having a moiety of the formula: ##EQU1##
    Type: Grant
    Filed: March 31, 1975
    Date of Patent: October 12, 1976
    Assignee: Ashland Oil, Inc.
    Inventors: Robert A. Grimm, Owen Portwood, Edward A. Sedor, Jeannene A. Williams