Patents by Inventor James C. Fang

James C. Fang 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: 4243504
    Abstract: Fluorovinyl ether polymers consisting essentially of 60 to 99.9 mole percent of monomeric units --CF.sub.2 CFY-- and 0.1 to 40 mole percent of the structural units ##STR1## wherein Y is F, H, Cl, Br, R.sub.f or OR.sub.f, R.sub.f is perfluoroalkyl, R is alkyl, Q is F or OR, and m is 0 or 1, are prepared by contacting a fluoropolymer of the formula (CF.sub.2 CFY).sub.x wherein at least 1% of the Y's are reactive sites selected from the group consisting of H, Cl and Br, with an alkali or alkaline earth metal alkoxide.Electrolytic cell diaphragms are prepared by forming the above fluorovinyl ether polymer and fibrous material into a diaphragm, heating the diaphragm thereby converting alkyl ether groups to carbonyl groups, and treating with an alkali metal hydroxide thereby converting carbonyl groups to carboxylate ion groups.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: January 6, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James C. Fang, Carl G. Krespan
  • Patent number: 4238303
    Abstract: Magnesium compounds, such as magnesium oxide or hydroxide, at least partially reacted with fluoropolymer containing carboxyl ions, carboxylic acid or carbonyl fluoride functional groups provide compositions which are useful as modifiers for asbestos diaphragms for chlor-alkali cells to reduce the voltage and increase the efficiency of such cells.
    Type: Grant
    Filed: August 14, 1978
    Date of Patent: December 9, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4189369
    Abstract: Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkali cells used in the production of chlorine, hydrogen and sodium hydroxide from brine.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: February 19, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4188469
    Abstract: Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkali cells used in the production of chlorine, hydrogen and sodium hydroxide from brine.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: February 12, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4186084
    Abstract: Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkali cells used in the production of chlorine, hydrogen and sodium hydroxide from brine.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: January 29, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4173526
    Abstract: Magnesium compounds are added to chlor-alkali cell asbestos diaphragms, either initially or after some use, to improve electrical operating characteristics.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: November 6, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4169024
    Abstract: Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkali cells used in the production of chlorine, hydrogen and sodium hydroxide from brine.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: September 25, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4164463
    Abstract: Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkali cells used in the production of chlorine, hydrogen and sodium hydroxide from brine.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: August 14, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4153520
    Abstract: Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkali cells used in the production of chlorine, hydrogen and sodium hydroxide from brine.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: May 8, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4143204
    Abstract: Articles bearing unilayered coatings of tetrafluoroethylene/hexafluoropropylene copolymer and at least one auxiliary film-forming material.
    Type: Grant
    Filed: January 24, 1974
    Date of Patent: March 6, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4127551
    Abstract: Mixed esters of dibasic unsaturated acids, glycols and glycidyl esters, when formulated with aminoplast resins, form coating compositions which require little or no organic liquid carrier. These compositions are useful for finishing appliances and automobiles and for general industrial use.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: November 28, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 4028309
    Abstract: Diesters and triesters of dibasic acids, glycols, triols, and glycidyl esters, when formulated with polyfunctional isocyanates, form coating compositions which require little or no organic liquid carrier. These compositions air-dry or cure at low temperatures, and give off little or no organic liquid on drying or curing, thereby conforming to most anti-pollution legislation and saving fuel.
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: June 7, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang
  • Patent number: 3954715
    Abstract: Esters of dibasic unsaturated acids and glycidyl esters, when formulated with aminoplast resins, form coating compositions which require little or no organic liquid carrier. These compositions are useful as primers in the finishing of appliances and automobiles, and for general industrial use.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: May 4, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James C. Fang