Patents by Inventor Joseph B. Hanson

Joseph B. Hanson 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).

  • Boron compounds to inhibit formation of tar during the "ene" reaction of an ethylenically unsaturated alpha, beta dicarboxylic acid compound and an ethylenically unsaturated hydrocarbon
    Patent number: 4736044
    Abstract: A process for the production of a substituted alpha, beta dicarboxylic acid compound substantially free of tar and other resinous reaction byproducts comprising the reaction at conditions favoring the ENE reaction of an ethylenically unsaturated hydrocarbon and an ethylenically unsaturated alpha, beta dicarboxylic acid compound in the presence of a boron compound.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: April 5, 1988
    Assignee: Amoco Corporation
    Inventor: Joseph B. Hanson
  • Mannich additives modified by ditertiary alkyl phenol
    Patent number: 4242212
    Abstract: Mannich additives formed from a 2,4- or 2,6-ditertiary alkyl "hindered" phenol, a polyamine, a formaldehyde-yielding reagent and at least one substantially hydrocarbon compound with at least one active or acidic hydrogen selected from the group consisting of a para mono-alkyl phenol, and an oxidized olefinic polymer, are improved Mannich additives for high temperature internal combustion engine lubrication.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: December 30, 1980
    Assignee: Standard Oil Company (Indiana)
    Inventor: Joseph B. Hanson
  • Polyamine derivatives of oxidized olefinic substituted dicarboxylic acid compounds
    Patent number: 4203730
    Abstract: A polyamine derivative of an oxidized substantially undegraded olefinic substituted dicarboxylic acid compound and gasoline compositions containing an effective amount of the reaction product.
    Type: Grant
    Filed: September 14, 1978
    Date of Patent: May 20, 1980
    Assignee: Standard Oil Company (Indiana)
    Inventor: Joseph B. Hanson
  • Preparation of catechol derivatives
    Patent number: 4086265
    Abstract: A method of preparing derivatives of aromatic compounds including the catechol function ##STR1## by replacement of one of the hydroxyls by mercaptan ##STR2## Cathechol or a multi-ring compound (naphthyl-, anthryl-, phenanthryl-, etc.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: April 25, 1978
    Assignee: The Regents of the University of Minnesota
    Inventors: Raymond M. Dodson, Joseph B. Hanson