Patents Represented by Attorney, Agent or Law Firm Melvin D. Fletcher
  • Phosphorous removal from chlorosilane
    Patent number: 5723644
    Abstract: A method for the purification of chlorosilanes used for the manufacture of electronic-grade silicon and more particularly to a method for removing trace contaminants of phosphorus. The method comprises contacting a mixture comprising a chlorosilane and a phosphorus contaminant with an absorbent comprising a copper or compound of copper supported on silica.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: March 3, 1998
    Assignee: Dow Corning Corporation
    Inventor: Ming-Shin Tzou
  • Siloxy phosphonate as stabilizing agent for polydiorganosiloxanes
    Patent number: 5710300
    Abstract: A method for stabilizing a mixture comprising a polydiorganosiloxane and an alkali metal. The method comprises contacting a polydiorganosiloxane and an alkali metal with a siloxy phosphonate described by formula ##STR1## where each R.sup.1, R.sup.2, and R.sup.3 is an independently selected hydrocarbon comprising one to about 12 carbon atoms, n=0 or 1, and x, y, and z are integers, where x=1 to 1000, y=0 to 1000, and z=0 to 1000.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: January 20, 1998
    Assignee: Dow Corning Corporation
    Inventors: Daniel Graiver, Arnold Wade Lomas
  • Process for the industrial manufacture of a cycloalkylsilane or polyorganosiloxane
    Patent number: 5670688
    Abstract: This invention relates to a process for the manufacture of a silane or polyorganosiloxane containing a cycloalkyl substituent by hydrogenation of a silane or polyorganosiloxane containing at least one aromatic hydrocarbon substituent in the presence of a Raney nickel catalyst without a solvent.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: September 23, 1997
    Assignee: Dow Corning Corporation
    Inventors: Paul Charles Dinh, Binh Thanh Nguyen