Patents by Inventor Richard Y. Wen

Richard Y. Wen 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).

  • Compositions and methods for inhibiting plaque formation
    Patent number: 4161518
    Abstract: A dentifrice composition is provided containing a quaternary ammonium organosiloxane having the formula ##STR1## wherein R.sup.1 is an alkoxy group having from 1 to 5 carbon atoms, R.sup.2 is an alkylene group having from 1 to 25 carbon atoms, and R.sup.3, R.sup.4 and R.sup.5 are, individually, alkyl groups of from 1 to 25 carbon atoms, and X is an anion, preferably selected from chlorine, bromine fluorine and iodine. A method of inhibiting plaque formation on teeth in an oral environment is also provided.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: July 17, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard Y. Wen, Linda L. LaFleur, Michael R. Engel, Anthony J. Lucas
  • Microcapsule insecticide composition
    Patent number: 4056610
    Abstract: A microcapsule insecticide composition comprising microcapsules each having a polyurea shell wall including as an integral part of said shell a photostable ultraviolet light absorbent compound with a log molar extinction coefficient of from about 2 to about 5 with respect to radiation having wave lengths in the range of from about 270 to 350 nanometers and a liquid fill capable of slowly permeating the shell and comprising a pyrethroid and a biological synergist therefor.
    Type: Grant
    Filed: August 24, 1976
    Date of Patent: November 1, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Loren L. Barber, Jr., Anthony J. Lucas, Richard Y. Wen