Patents by Inventor Richard B. Pollak

Richard B. Pollak 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).

  • Endodontic filling and sealing composition
    Patent number: 4449938
    Abstract: A biologically compatible non-toxic composition which when mixed, is useful as an in situ curing endodonic filling material. The composition has two separately packaged components. One component is a paste which contains a low viscosity hydroxy terminated polydialkylsiloxane and a non-reactive silicone oil diluent having a viscosity of from about 20 to 20,000 centistrokes at 25.degree. C. and comprising a polydialkylsiloxane. The other component is a liquid which includes (i) the reaction product resulting from the refluxing at ambient pressure and a temperature of about 150.degree. to about 175.degree. C.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: May 22, 1984
    Assignee: Lee Pharmaceuticals, Inc.
    Inventor: Richard B. Pollak