Patents by Inventor William Grant Pierson

William Grant Pierson 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).

  • Toothpaste
    Patent number: 3943240
    Abstract: Toothpaste containing sodium bicarbonate as the principal abrasive and a lesser amount of another compatible abrasive. Examples of these are chalk, silica, alumina, zirconium silicate or sodium aluminosilicate, or a mixture thereof, said other abrasive constituting at least about 3 percent of the toothpaste.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: March 9, 1976
    Assignee: Colgate-Palmolive Company
    Inventors: Thomas James Delaney, William Grant Pierson
  • Toothpaste
    Patent number: 3937321
    Abstract: Toothpaste containing sodium bicarbonate as the principal abrasive and a lesser amount of another compatible abrasive. Examples of these are chalk, silica, alumina, zirconium silicate or sodium aluminosilicate, or a mixture thereof, said other abrasive constituting at least about 3% of the toothpaste.
    Type: Grant
    Filed: November 28, 1973
    Date of Patent: February 10, 1976
    Assignee: Colgate-Palmolive Company
    Inventors: Thomas James Delaney, William Grant Pierson
  • Toothpaste
    Patent number: 3937804
    Abstract: Toothpaste containing sodium bicarbonate as the principal abrasive and a lesser amount of another compatible abrasive. Examples of these are chalk, silica, alumina, zirconium silicate of sodium aluminosilicate, or a mixture thereof, said other abrasive constituting at least about 3% of the toothpaste.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: February 10, 1976
    Assignee: Colgate-Palmolive Company
    Inventors: Thomas James Delaney, William Grant Pierson
  • Flavored dental creams
    Patent number: 3937803
    Abstract: Toothpaste containing sodium bicarbonate as the principal abrasive together with essential oil flavoring agent in a thickened water-glycerol vehicle in which the water:glycerol ratio is in the range of about 0.4:1 to 0.7:1.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: February 10, 1976
    Assignee: Colgate-Palmolive Company
    Inventors: Thomas James Delaney, William Grant Pierson
  • Toothpaste
    Patent number: 3935305
    Abstract: Toothpaste containing calcium carbonate as the principal abrasive and a lesser amount of sodium bicarbonate as an additional abrasive. The principal abrasive of the toothpaste may also be comprised of a mixture of abrasives such as chalk, silica, alumina, zirconium silicate or sodium aluminosilicate in combination with the minor amount of sodium bicarbonate. The latter may be included in amounts up to about 25%, while the former may be included in amounts up to about 60%.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: January 27, 1976
    Assignee: Colgate-Palmolive Company
    Inventors: Thomas James Delaney, William Grant Pierson
  • Dental creams
    Patent number: 3935304
    Abstract: There is disclosed a toothpaste containing dispersed particles of sodium bicarbonate and a polishing agent composition comprising titanium dioxide powder having a particle size less than about 2 microns, the amount of titanium dioxide powder being about 0.1 by weight on the weight of the toothpaste and a method of making same.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: January 27, 1976
    Assignee: Colgate-Palmolive Company
    Inventors: Joseph P. Januszewski, Martin Cordon, William Grant Pierson