Patents by Inventor Philip L. Straw

Philip L. Straw 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).

  • Oral hygiene compositions
    Patent number: 5015465
    Abstract: An oral hygiene composition comprising a silica base, from 1 to 10% by weight of the composition of a water solouble non-toxic strontium salt, a fluoride source providing from 250 ppm to 2000 ppm of fluoride in the composition, and a dentally acceptable carrier, provided that when the strontium salt is other than strontium acetate the silica base has a BET surface area of from 50 to 400 m.sup.2 /g.The composition has improved anti-sensitivity properties coupled with high levels of available fluorine.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: May 14, 1991
    Assignee: Beecham Group P.L.C.
    Inventor: Philip L. Straw