Patents by Inventor James Lang Webster

James Lang Webster 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).

  • Patent number: 5744657
    Abstract: Tetrafluoroethylene and other valuable 2-carbon atom fluorocarbon is made by reacting fluorine-containing compound such metal fluoride with CO in an energized state, e.g. plasma excitation, to form a gaseous reaction mixture which is a precursor to COF.sub.2, followed by reacting this reaction mixture with carbon and quenching to obtain the desired fluorocarbon.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: April 28, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: James Lang Webster
  • Patent number: 5684218
    Abstract: Tetrafluoroethylene is obtained by subjecting metal fluoride, such as sodium fluoride, calcium fluoride or silicon fluoride, to a plasma to form a gaseous mixture of metal and reactive fluorine. This gaseous mixture is then reacted with a bed of carbon particles at a temperature at which the metal, when non-carbonaceous, does not condense. The resultant reaction mixture is then quenched to obtain the tetrafluoroethylene. Typically, the plasma will be at a temperature of at least 4500.degree. C. and the temperature of the carbon bed will be in the range of 2000.degree. C. to 3500.degree. C.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: November 4, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James Lang Webster
  • Patent number: 5648530
    Abstract: Carbonyl fluoride is produced by reacting fluorine-containing compound such as metal fluoride with CO in an excited state, such as produced by a plasma, to obtain a gaseous reaction mixture, which can then be quenched to obtain the COF.sub.2.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: July 15, 1997
    Inventor: James Lang Webster
  • Patent number: 4056653
    Abstract: Spherical-shaped particles having an average diameter of 10 to 100 microns and the surface thereof is covered with hemispherical-shaped bumps about 0.1 micron in diameter, the particles being a copolymer of alpha-olefins and alpha, beta-ethylenically unsaturated carboxylic acid having 3 to 8 carbon atoms, the copolymer having up to 90% of the carboxylic acid groups ionized by neutralization with metal ions. The particles form a free-flowing powder useful in preparing clear, protective, shatter-resistant coatings for glass, and protective coatings for metals and other material.
    Type: Grant
    Filed: September 24, 1975
    Date of Patent: November 1, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John Charles Gebhard, Jr., Marion Glen Waggoner, James Lang Webster
  • Patent number: 3933954
    Abstract: Method whereby spherical-shaped copolymer particles having a rough surface are produced. In a closed shear zone of a shear device under positive pressure water, at least 0.6% by weight of ammonia, and up to 50% by weight of copolymers of alpha-olefins and alpha, beta-ethylenically unsaturated carboxylic acids having from 3 to 8 carbon atoms, and optionally an additional monoethylenically unsaturated monomer, the copolymer having from 0% to 90% of the carboxylic acid groups ionized by neutralization with metal ions, are sheared at a temperature above the melting point but below the thermal degradation point of the copolymer to form a homogeneous aqueous slurry wherein the copolymer particles have an average particle size of less than 100 microns. The slurry is maintained with agitation at a temperature above the copolymer melting point for at least 0.5 minute until substantially all the copolymer particles become spherical.
    Type: Grant
    Filed: November 28, 1973
    Date of Patent: January 20, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John Charles Gebhard, Jr., Marion Glen Waggoner, James Lang Webster