Patents by Inventor Ning Sun

Ning Sun 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).

  • Inhibiting popcorn polymer formation with esters of inorganic acids
    Patent number: 5072066
    Abstract: Inhibition of popcorn polymer growth by treatment with an inorganic acid ester. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: December 10, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Hsiang-ning Sun
  • Inhibiting popcorn polymer formation with alkyl halides
    Patent number: 5072065
    Abstract: Inhibition of popcorn polymer growth by treatment with an alkyl halide. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: December 10, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Hsiang-ning Sun, Steven J. Potlock
  • Formation of discrete polyalkylene carbonate particles by solvent/non-solvent precipitation
    Patent number: 5041469
    Abstract: Discrete, non-agglomerating particles of polyalkylene carbonate are produced by solvent/non-solvent precipitation using certain solvent/non-solvent systems. The free-flowing particles obtained are from 30 to 3000 microns in diameter and are suitable for use in a variety of applications, particularly the preparation of foamed articles.
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: August 20, 1991
    Assignee: Arco Chemical Technology, Inc.
    Inventors: Donald E. Hostetler, Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
  • Formation of discrete polyalkylene carbonate particles by solvent/non-solvent precipitation
    Patent number: 4975525
    Abstract: Discrete, non-agglomerating particles of polyalkylene carbonate are produced by solvent/non-solvent precipitation using certain solvent/non-solvent systems. The free-flowing particles obtaine are from 30 to 3000 microns in diameter and are suitable for use in a variety of applications, particularly the preparation of foamed articles.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: December 4, 1990
    Assignee: Arco Chemical Technology, Inc.
    Inventors: Donald E. Hostetler, Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
  • Preparation of discrete particles of polyalkylene carbonate
    Patent number: 4853462
    Abstract: The selection of the proper solvent systems for polyalkylene carbonates which completely dissolve the polymer at high temperatures but are non-solvents at lower temperatures allows one to obtain discrete particles of the polymers suitable for many applications, processing and handling. The particles size can be controlled from about 30 to about 3000 microns in diameter.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: August 1, 1989
    Assignee: Arco Chemical Technology, Inc.
    Inventors: Donald E. Hostetler, Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
  • Melt processable aliphatic polycarbonate terpolymers
    Patent number: 4851507
    Abstract: The addition of a small amount of a second epoxide to the copolymerization of ethylene oxide or propylene oxide with carbon dioxide can give a melt processable polyalkylene carbonate terpolymer which can be processed without extensive thermal decomposition. This invention has particular utility in thermoplastic applications such as injection molding, blow molding, and film manufacture.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: July 25, 1989
    Assignee: Arco Chemical Technology, Inc.
    Inventors: Haven S. Kesling, Jr., Michael J. Cannarsa, Hsiang-Ning Sun
  • Polyalkylene carbonate hot melt adhesive
    Patent number: 4833036
    Abstract: Copolymers or terpolymers of carbon dioxide and at least one epoxide are found to be useful in formulations for adhesive compositions. Polarity due to the carbonate group and non-polarity due to the alkylene groups in the resulting polyalkylene carbonates makes it possible to adhere a large number of different surfaces such as steel, aluminum, fluoropolymers, and polyesters to themselves or to each other.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: May 23, 1989
    Assignee: ARCO Chemical Technology, Inc.
    Inventors: Michael J. Cannarsa, Haven S. Kesling, Jr., Donald E. Hostetler, Terence A. Cooper, Hsiang-Ning Sun
  • Reduction of catalyst usage in epoxide/CO.sub.2 polymerization
    Patent number: 4789727
    Abstract: The catalyst efficiency of zinc carboxylate catalyst in the copolymerization of alkylene oxides with carbon dioxide to form polycarbonates has been increased by the addition of a small amount of certain diepoxides to the reaction.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: December 6, 1988
    Assignee: Arco Chemical Company
    Inventor: Hsiang-Ning Sun
  • Soluble epoxide/carbon dioxide copolymerization catalysts
    Patent number: 4783445
    Abstract: Catalysts which are soluble in a variety of solvents are prepared by reacting zinc compounds with anhydrides in the presence of an alcohol or by reacting zinc salts with a monoester of a dicarboxylic acid. These catalysts can be added as a solution to a mixture of epoxides and carbon dioxide to prepare polyalkylene carbonates.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: November 8, 1988
    Assignee: Arco Chemical Company
    Inventor: Hsiang-Ning Sun
  • Skeletal isomerization of olefins over halogen-containing alkaline earth oxide catalysts
    Patent number: 4778943
    Abstract: A process for the skeletal isomerization of olefins wherein the olefins are contacted with a catalyst comprising at least one alkaline earth oxide which has been treated with a halogen compound.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: October 18, 1988
    Assignee: Atlantic Richfield Company
    Inventor: Hsiang-ning Sun
  • Process for preparing polycarbonate copolymer foam suitable for lost foam casting
    Patent number: 4773466
    Abstract: The evaporative casting of molten metals has been shown to produce castings having smooth surfaces without any sign of carbon deposits thereon by using a copolymer polycarbonate prepared from cyclohexene oxide, cyclopentene oxide, cycloheptene oxide, or isobutylene oxide and carbon dioxide.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: September 27, 1988
    Assignee: ARCO Chemical Company
    Inventors: Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
  • Process for preparing polycarbonate terpolymer foam suitable for lost foam casting
    Patent number: 4763715
    Abstract: The evaporative casting of molten metals has been shown to produce castings having smooth surfaces without any sign of carbon deposits thereon by using a terpolymer polycarbonate prepared from cyclopentene oxide or cyclohexene oxide, ethylene oxide, propylene oxide, or butylene oxide, and carbon dioxide in making patterns for the lost foam casting process.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: August 16, 1988
    Assignee: Arco Chemical Company
    Inventors: Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
  • Skeletal isomerization of olefins over bromided aluminas
    Patent number: 4654463
    Abstract: A process for the skeletal isomerization of olefins wherein the olefins are contacted with a bromided alumina catalyst prepared by contacting alumina with a vapor selected from the group consisting of HBr, organic bromides, and Br.sub.2 /hydrocarbon mixtures.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: March 31, 1987
    Assignee: Atlantic Richfield Company
    Inventors: Hsiang-ning Sun, Robert G. Gastinger
  • Medium for plant protoplast culture
    Patent number: 4533636
    Abstract: A culture medium and method for the isolation and culture of plant protoplasts is disclosed which includes in it a quantity of neutral mammalian blood serum. An addition of 1 to 25% serum to protoplast media results in a greater yield of viable protoplast cells, helps to protect the protoplasts in culture, and makes it possible to obtain and maintain corn protoplasts, a heretofore difficult task.
    Type: Grant
    Filed: August 25, 1983
    Date of Patent: August 6, 1985
    Assignee: Agracetus Madison Corporation
    Inventor: Ning-Sun Yang
  • Plant tissue culture device
    Patent number: 4531324
    Abstract: A plant tissue culture device is disclosed for the culturing of a plurality of plant cell tissue cultures or callus cultures on a liquid medium. The cultures are maintained in culture wells on a culture plate and a porous wick is used to transport nutrient medium to the cultures from a supply of medium in a medium vessel underneath the culture plate.
    Type: Grant
    Filed: October 7, 1983
    Date of Patent: July 30, 1985
    Assignee: Agracetus
    Inventors: Ning-Sun Yang, Alan Paau
  • Method for producing a vanadium-titanium-tin catalyst exhibiting improved intrinsic surface area
    Patent number: 4448898
    Abstract: Mixed vanadium-titanium-tin oxides catalysts having intrinsic surface areas before surface modification, greater than about 40 m.sup.2 /gram are disclosed. These catalysts are suitable for use in the preparation of acetic acid by gas-phase oxidation of butenes.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: May 15, 1984
    Assignee: Altantic Richfield Company
    Inventor: Hsiang-Ning Sun
  • Two step process for the preparation of zeolite A by hydrothermal treatment of heulandite
    Patent number: 4401633
    Abstract: A two step hydrothermal process for the preparation of a sodium cation form of zeolite A from heulandite by (1) heat treating a mixture of heulandite in an aqueous solution of sodium hydroxide and filtering the mixture followed by (2) reacting the filtrate with at least 75 percent of a stoichiometric amount of sodium aluminate to form and precipitate zeolite A from solution and recovering zeolite A.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: August 30, 1983
    Assignee: Atlantic Richfield Company
    Inventor: Hsiang-ning Sun
  • Two step process for the preparation of zeolite A by hydrothermal treatment of clinoptilolite
    Patent number: 4401634
    Abstract: A two step hydrothermal process for the preparation of zeolite A from clinoptilolite by (1) heat treating a mixture of clinoptilolite in an aqueous solution of sodium hydroxide and filtering the mixture followed by (2) reacting the filtrate with at least 75 percent of a stoichiometric amount of sodium aluminate to form and precipitate zeolite A from solution and recovering zeolite A.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: August 30, 1983
    Assignee: Atlantic Richfield Company
    Inventor: Hsiang-ning Sun
  • Hydrogen peroxide production
    Patent number: 4393038
    Abstract: Hydrogen is diffused through a palladium-containing membrane into an aqueous solution containing ions of a stabilizing nature and containing dissolved oxygen to form hydrogen peroxide. Some water is formed as a by-product. The hydrogen peroxide may be identified and/or recovered from said aqueous solution in an identification zone.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: July 12, 1983
    Assignee: Atlantic Richfield Company
    Inventors: Hsiang-ning Sun, John J. Leonard, Harold Shalit