Patents by Inventor Pen-Chung Wang

Pen-Chung Wang 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).

  • Spirodilactam derivatives
    Patent number: 5093499
    Abstract: Novel monomeric compounds containing aliphatic and/or aromatic substituents on the 1,6-diazaspiro[4.4]nonane-2,7-dione ring system are produced by contacting an amine or an amine hydrohalide and a 1,6-dioxaspiro[4.4]nonane-2,7-dione or a 4-oxoheptanedioic acid. The resulting spirodilactam compounds are characterized by improved hydrolytic and thermal oxidative stability and some of the compounds are useful as intermediates to polymers containing the 1,6-diazaspiro[4.4]nonane-2,7-dione ring system.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: March 3, 1992
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Polyamide containing spirodilactam moieties
    Patent number: 5093465
    Abstract: Novel polymers containing amide moieties are produced by reaction of a spirodilactam precursor selected from 4-oxoheptanedioic acid compounds or 1,6-dioxa [4.4] spirodilactones, a primary diamine and an aromatic, aliphatic or alicyclic dicarboxylic acid compound. The polymer products have relatively high glass transition temperature.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: March 3, 1992
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Benzheterocyclic compounds
    Patent number: 5071996
    Abstract: Novel hydroxy-benzoheterocyclic-substituted 3-oxopentane derivatives are produced by reaction of a hydroxy-containing ortho-phenylene amine compound and the source of a five-carbon keto-containing moiety selected from 4-oxoheptanedioic acid compounds or 1,6-dioxa[4.4]spirodilactones. The derivatives produced from hydroxy-phenylenediamines are further reacted to produce compounds of higher cyclic functionality.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: December 10, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Arylcyclobutene carboxylate esters
    Patent number: 5068396
    Abstract: Novel 1-arylcyclobutenecarboxylate ester derivatives of N-glycidylamine compounds are self-curing thermosetting resins. The cured products obtained by applying heat to the ester derivatives, in the presence of or in the absence of added curing agent, are crosslinked insoluble solid materials having useful properties.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: November 26, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Poly(ether-bis-imide-spiro dilactam) polymer
    Patent number: 5061780
    Abstract: Novel poly(etherimide) polymers and a method for the production thereof, which polymers are characterized by moieties of a dioxyaryl-substituted 1,6-diaza [4,4] spirodilactam, alternating with moieties of a bis(imide) and, optionally, with moietis of a di(oxyphenyl) compound. The polymers are thermoplastic polymers of relatively high glass transition temperature.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: October 29, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Hydroxy-substituted cyclic-1,6-diaza[4.4]spirodilactams
    Patent number: 5053518
    Abstract: Novel cyclic 1,6-diazaspiro [4.4] lactams are produced by reaction of at least one hydroxy-containing primary amino compound with a 4-ketocyclicdiacid compound or a cyclic-1,6-dioxaspiro[4.4] lactone.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: October 1, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Cyano- and carboxy-substituted spirodilactams
    Patent number: 5037948
    Abstract: A novel class of cyano-, cyanoalkyl-, carboxy- or carboxyalkylaryl-substituted 1,6-diaza [4.4] spirodilactams, having a cyano-, cyanoalkyl-, carboxy- or carboxyalkylaryl substituent attached to each spiro ring nitrogen atom, are useful for the preparation of polyesters and polyamides.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: August 6, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Polycarbonate polymer having spirodilactam moieties
    Patent number: 5030707
    Abstract: Novel polycarbonate polymers comprise regular, alternating units of (a) a 1,6-diaza [4.4] spirodilactam having oxyaryl substituents on each spiro ring nitrogen atom and (b) a di(oxyphenyl) compound, the units being separated by carbonyl groups. The regular, alternating polycarbonate polymers exhibit improved hydrolytic stability.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: July 9, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Polyamideimide polymers
    Patent number: 5028688
    Abstract: Novel poly(amideimide) polymers and a method for the production thereof, which polymers are characterized by moieties of a 1,6-diaza [4.4] spirodilactam and of a bis(maleimide) alternating with the non-amino portion of a primary diamine wherein the amino groups are not located upon adjacent carbon atoms. The polymers are thermoplastic polymers of relatively high glass transition temperature.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: July 2, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Thermosetting resin compositions
    Patent number: 5001213
    Abstract: Novel thermosetting resin compositions comprise a mixture of the epoxyalkylether of a 1,6-diazo[4.4]spirodilactam having a hydroxyaryl substituent on each of the spiro ring nitrogen atoms, and at least one amine compound. The cured compositions obtained by heating the resin compositions to an elevated temperature have relatively high glass transition temperatures and good physical properties.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: March 19, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Preparation of polyarylate polymers of hydroxyaryl-substituted 1,6-diaza [4.] spirodilactams
    Patent number: 4992526
    Abstract: High molecular weight polyarylate polymers comprise alternating moieties derived from an aromatic dicarboxylic acid halide, with moieties derived from a hydroxyaryl-substituted 1,6-diaza [4.4] spirodilactam compound and, optionally, with moieties derived from a di(hydroxyphenyl) compound are prepared by interfacial polymerization in an aqueous-organic medium containing an alcohol.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: February 12, 1991
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Polyamideimide polymers
    Patent number: 4978736
    Abstract: Novel poly(amideimide) polymers and a method for the production thereof, which polymers are characterized by moieties of a 1,6-diaza [4.4] spirodilactam and of a bis(maleimide) alternating with the non-amino portion of a primary diamine wherein the amino groups are not located upon adjacent carbon atoms. The polymers are thermoplastic polymers of relatively high glass transition temperature.
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: December 18, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Polyarylate polymers
    Patent number: 4977235
    Abstract: Novel polyarylate polymers comprise alternating moieties derived from an aromatic dicarboxylic acid halide, with moieties derived from a hydroxyaryl-substituted 1,6-diaza [4.4] spirodilactam compound and, optionally, with moieties derived from a di(hydroxyphenyl) compound. The polyarylate polymers are thermoplastic polymers characterized by relatively high glass transition temperatures.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: December 11, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Spirolactonelactams
    Patent number: 4968812
    Abstract: A novel class of bis(spirolactonelactam) compounds is produced by reaction of a primary diamine in the presence of a stoichiometric excess of a spirodilactam precursor selected from ketodiacid compounds and 1,6-dioxo [4.4] spirodilactones.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: November 6, 1990
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, William J. Asbell
  • Novel polyaryl ethers
    Patent number: 4968769
    Abstract: Novel linear, alternating polyarylene ethers are characterized by moieties derived from a halo-substituted arylene compound having an electron-withdrawing substituent on each of from 1 to 2 aromatic rings alternating with moieties of a 1,6-diaza[4.4]spirodilactam compound having oxyphenyl substituents on each spiro ring ntrogen atom and, optionally, moieties of a di(4-oxyphenyl) compound.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: November 6, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Polyestercarbonate polymer containing spirodi lactam moiety
    Patent number: 4968768
    Abstract: Novel polyestercarbonate polymers contain moieties derived from hydroxyaryl-substituted 1,6-diaza [4.4] spirodilactam alternating with moieties derived from a bisphenol haloformate or an aromatic dicarboxylic acid halide, the linking moieties being oxycarbonyl or carbonyldioxy, respectively. The polymers are thermoplastics of relatively high melting points or glass transition temperatures, useful as engineering thermoplastics in elevated temperature applications.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: November 6, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Spirodilactam derivatives
    Patent number: 4963691
    Abstract: Novel monomeric compounds containing the 2,7-diazaspiro[4.4]-nonane-1,6-dioine ring system are produced by contacting an amine hydrohalide and a 2,7-dioxaspiro[4.4]nonane-1,6-dione. The resulting spirodilactam compounds are characterized by improved hydrolytic and thermal oxidative stability.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: October 16, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Thermosetting resin compositions
    Patent number: 4954584
    Abstract: Thermosetting resin compositions comprise a mixture of a 1-arylcyclobutenecarboxylate ester of a glycidyloxy compound having at least two glycidyloxy substituents and at least one polymerizable monomer having at least two substituents with multiple valence bonds between adjacent atoms. Also claimed are the cured products obtained by heating such compositions.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: September 4, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Arylcyclobutene carboxylate esters
    Patent number: 4954583
    Abstract: Novel 1-arylcyclobutenecarboxylate esters of glycidyloxy compounds having at least two glycidyloxy substituents are self-curing thermoset resins. The cured products derived by applying heat to the esters are crosslinked insoluble solids having good properties.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: September 4, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang
  • Novel thermoplastic polymers
    Patent number: 4939227
    Abstract: Novel thermoplastic polymers comprise (1) moieties of a 1,6-diaza [4.4] spirodilactam having oxyaryl-containing substituents on the spiro ring nitrogen atoms, or, optionally, moieties of a di(oxyphenyl)compound, alternating with moieties derived from a mono- or binuclear hydantoin, the differing moieties being connected by 2-hydroxy-1,3-propylene linking groups.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: July 3, 1990
    Assignee: Shell Oil Company
    Inventor: Pen-Chung Wang