Patents by Inventor Catherine L. Howie

Catherine L. Howie 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).

  • Anticalculus oral compositions containing combinations of polymers
    Patent number: 5194246
    Abstract: A method and composition for controlling calculus formation in the mouth is reported based upon a combination of a low and high molecular weight polymer. The first polymer is a synthetic anionic polymer having a molecular weight of at least 4000. The second polymer has a molecular weight up to about 2500 and is formed from a mixture of mono- and di- carboxylic vinyl monomers reacted with hypophosphite groups.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: March 16, 1993
    Assignee: Chesebrough-Pond's USA Co., Division of Conopco, Inc.
    Inventors: Carol K. Vincent, David L. Elliott, Catherine L. Howie-Meyers
  • Anticalculus oral composition containing combinations of organophosphorus polycarboxylate cotelomers and inorganic polyphosphate salts
    Patent number: 5143719
    Abstract: A method and composition for controlling calculus formation in the mouth is reported based upon a combination of inorganic polyphosphates and certain low molecular weight copolymers. These copolymers are formed from a mixture of mono- and di-carboxylic vinyl monomers reacted with hypophosphite groups. Particularly effective are phosphorous containing acrylate/maleate polymers of weight averaged molecular weight ranging from about 400 to 5000.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: September 1, 1992
    Assignee: Chesebrough-Pond's USA Co.
    Inventors: David L. Elliott, Catherine L. Howie-Meyers
  • Poly(alpha-hydroxy acrylic acid) and derivatives as antitartar actives in oral compositions
    Patent number: 5013541
    Abstract: An oral composition is provided which reduces formation of tartar on teeth. The active ingredient is poly(.alpha.-hydroxy acrylic acid) as well as phosphate, sulfate and alkoxy derivatives thereof.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: May 7, 1991
    Assignee: Conopco, Inc.
    Inventors: David L. Elliott, Catherine L. Howie
  • Hypophosphite-containing cotelomers as antitartar agents
    Patent number: 5011682
    Abstract: A method and composition for controlling tartar formation in the mouth is reported based upon low molecular weight polymers. These polymers are formed from a mixture of mono- and di- carboxylic vinyl monomers reacted with hypophosphite groups. Particularly effective are phosphorus containing acrylate/maleate polymers of weight averaged molecular weight ranging from about 400 to 5000.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: April 30, 1991
    Assignee: Conopco, Inc.
    Inventors: David L. Elliott, Catherine L. Howie, Peter G. Montague