Patents by Inventor Mark J. Hall

Mark J. Hall 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).

  • Stabilizer concentrate
    Patent number: 4877821
    Abstract: An improved stabilizer concentrate for use in stabilizing polymeric blend compositions which comprise a thermally sensitive interpolymer. The stabilizer concentrate comprises a carrier resin, and a stabilizing agent capable of stabilizing a thermally sensitive interpolymer. The improvement comprises employing a carrier resin having a viscosity such that the stabilizer concentrate has a viscosity of less than 60 percent of the viscosity of the polymeric blend composition.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: October 31, 1989
    Assignee: The Dow Chemical Company
    Inventors: Mark J. Hall, Joseph R. Powers, William A. Wood
  • Vinylidene chloride interpolymer possessing improved extrudability
    Patent number: 4692508
    Abstract: A process for improving the extrudability of a vinylidene chloride interpolymer pellet. A vinylidene chloride interpolymer pellet displaying a first endotherm, as determined by differential scanning calorimetry according to American Society of Testing and Materials Test Method D-3417, below 75.degree. Celsius is exposed to a temperature above about 55.degree. Celsius for a length of time sufficient to raise said first endotherm to 75.degree. Celsius or above. Pellets treated in such a manner possess improved extrudability.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: September 8, 1987
    Assignee: The Dow Chemical Company
    Inventors: Mark J. Hall, Kun S. Hyun
  • Star/comb-branched polyamine
    Patent number: 4690985
    Abstract: Star/comb-branched polyamides having good resistance to degradation upon exposure to shear are prepared by reacting polyvalent core compounds such as tribromoneopentyl alcohol with an oxazoline such as 2-ethyl-2-oxazoline to provide the desired polyamide. The polyamides are readily hydrolyzed with acid such as hydrochloric acid to form star/comb-branched polyamines. The polyamides and the polyamines are useful as viscosity enhancing agents in such applications as paints, mobility control agents and hydraulic fluids.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: September 1, 1987
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Tomalia, Mark J. Hall
  • Star/comb-branched polyamide
    Patent number: 4599400
    Abstract: Star/comb-branched polyamides having good resistance to degradation upon exposure to shear are prepared by reacting polyvalent core compounds such as tribromoneopentyl alcohol with an oxazoline such as 2-ethyl-2-oxazoline to provide the desired polyamide. The polyamides are readily hydrolyzed with acid such as hydrochloric acid to form star/comb-branched polyamines. The polyamides and the polyamines are useful as viscosity enhancing agents in such applications as paints, mobility control agents and hydraulic fluids.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: July 8, 1986
    Assignee: The Dow Chemical Company
    Inventors: Donald A. Tomalia, Mark J. Hall