Patents by Inventor Betty L. Vest

Betty L. Vest 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).

  • Finely divided saponified ethylene-vinyl acetate interpolymers
    Patent number: 4100335
    Abstract: A process for the simultaneous saponification and dispersion of ethylene-vinyl acetate interpolymers into spherical particles having a number average particle size of about 10 microns or less is provided when an organic nitrogen base is used as the saponifying agent and a particular ethylene oxide-propylene oxide block copolymer is used as the dispersing agent.
    Type: Grant
    Filed: September 9, 1976
    Date of Patent: July 11, 1978
    Assignee: National Distillers and Chemical Corp.
    Inventors: Dorothee M. McClain, Betty L. Vest
  • Finely divided saponified ethylene-vinyl acetate interpolymers
    Patent number: 4027079
    Abstract: A process for the production of saponified ethylene-vinyl acetate interpolymers into spherical particles having a number average particle size of about 10 microns or less is provided when a strong inorganic base is used as the saponification agent and a particular ethylene oxide-propylene oxide block copolymer is used as the dispersing agent, by reducing the amount of the residual salt in the product resin to less than about 0.1% calculated as the cation.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: May 31, 1977
    Assignee: National Distillers and Chemical Corporation
    Inventors: Dorothee M. McClain, Betty L. Vest
  • Finely divided saponified ethylene-vinyl acetate interpolymers
    Patent number: 3972865
    Abstract: A process for the production of hydrolyzed ethylene-vinyl acetate interpolymers into spherical particles having a number average particle size of about 10 microns or less is provided using an acid as the hydrolyzing agent and a particular ethylene oxide-propylene oxide block copolymer as the dispersing agent.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: August 3, 1976
    Assignee: National Distillers and Chemical Corporation
    Inventors: Dorothee M. McClain, Betty L. Vest