Patents by Inventor Rieko Hayashi

Rieko Hayashi 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 composition and abrasive therefor
    Patent number: 4743274
    Abstract: Calcium hydrogenphosphate anhydride is disclosed whose crystallite has an average size of 300 to 3,500 angstroms as measured by X-ray diffractometry, and preferably, which has a density of 2.650 to 2.885 grams per cubic centimeters, a specific surface area of 2.5 to 20 square meters per gram as measured by the BET method, and an average agglomerate diameter of 2 to 30 micronmeters has good physical properties as an abrasive, and that when it is used as an abrasive in an oral composition, the resulting oral composition is improved in cleaning action and in the effect of making the tooth aesthetically white without increasing its abrasiveness.
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: May 10, 1988
    Assignee: Lion Corporation
    Inventors: Toshiyuki Ozawa, Osamu Uotani, Rieko Hayashi
  • Oral composition and abrasive therefor
    Patent number: 4587120
    Abstract: Calcium hydrogenphosphate anhydride is disclosed whose crystallite has an average size of 300 to 3,500 angstroms as measured by X-ray diffractometry, and preferably, which has a density of 2.650 to 2.885 grams per cubic centimeters, a specific surface area of 2.5 to 20 square meters per gram as measured by the BET method, and an average agglomerate diameter of 2 to 30 micronmeters has good physical properties as an abrasive, and that when it is used as an abrasive in an oral composition, the resulting oral composition is improved in cleaning action and in the effect of making the tooth aesthetically white without increasing its abrasiveness.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: May 6, 1986
    Assignee: Lion Corporation
    Inventors: Toshiyuki Ozawa, Osamu Uotani, Rieko Hayashi