Patents by Inventor Donald K. Takehara

Donald K. Takehara 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).

  • Preparation and processing of polydiorganosiloxanes
    Patent number: 5357016
    Abstract: The instant invention pertains to a method for producing polydiorganosiloxanes wherein the method comprises contacting (A) at least one organosilicon compound having in the molecule at least one silanol group and/or (C) triorganosilyl endblocker and (D) a diorganocyclicsiloxane with (B) a cation exchanged acid treated montmorillonite clay. The polydiorganosiloxanes produced by the method of this invention have less branching along the siloxane chain than those polydiorganosiloxanes produced by other methods.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: October 18, 1994
    Assignee: Dow Corning Corporation
    Inventor: Donald K. Takehara