Patents by Inventor Henry P. Barker

Henry P. Barker 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).

  • Process for the production of pellets of a heat fusible thermosettable molding composition
    Patent number: 4454089
    Abstract: A process for producing pellets of a heat fusible thermosettable molding composition from a substantially hot melt material of a heat fusible thermosettable molding composition which comprises supplying said melt material between a calendering roll peripherally formed with recesses and another rigid surface which forms said molten material into pellets. Also, the instant invention is directed to the apparatus by which these pellets are produced.
    Type: Grant
    Filed: April 21, 1982
    Date of Patent: June 12, 1984
    Assignee: Plastics Engineering Company
    Inventors: Henry P. Barker, Lewis J. Rummings
  • Solvent sweeping of polycarbonates
    Patent number: 4306057
    Abstract: Novel thermoplastic molding compositions are disclosed which comprise a polycarbonate molding powder in admixture with a minor amount of a volatile matter entraining agent selected from the group consisting essentially of monochlorobenzene, a polyhydric material and solutions of a polyhydric material in water. A method of preparing a polycarbonate molding composition containing reduced amounts of volatile impurities is also disclosed.
    Type: Grant
    Filed: July 3, 1979
    Date of Patent: December 15, 1981
    Assignee: General Electric Company
    Inventors: Henry P. Barker, Gary S. Motz, Donald L. Phipps, Phillip S. Wilson
  • Process and apparatus for the drying of resinous materials
    Patent number: 4209912
    Abstract: A novel process for the drying of resinous materials is disclosed which comprises superheating a solution of the resinous material and spraying the superheated solution through one or more venturi shaped nozzles at high pressure in order to provide resultant material in the form of discrete particles having a lowered moisture content. A novel design for a venturi nozzle which may be advantageously employed in carrying out the drying process of the present invention is also disclosed.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: July 1, 1980
    Assignee: General Electric Company
    Inventor: Henry P. Barker
  • Process for preparing 2,2-bis(4-hydroxy-phenyl) propane from distillation by-products thereof
    Patent number: 4192954
    Abstract: A process is disclosed for the production of 2,2-bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, from by-products remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the by-products with phenol and adding anhydrous hydrogen chloride under superatmospheric pressure to the resulting mixture to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: March 11, 1980
    Assignee: General Electric Company
    Inventors: Henry P. Barker, Lawrence C. Mitchell