Patents by Inventor John C. Chen

John C. Chen 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).

  • Publication number: 20020053180
    Abstract: A resiliently flexible construction beam includes a pair of lateral flange portions and a web extending therebetween, preferably, but not necessarily, so as to present a cross-sectional profile corresponding to commonly used construction beam members (e.g., 2″×4″ or 2″×6″). The resilience of the beam helps to attenuate sound transmission through the beam from one lateral member to the other. In particular, in a wall frame, beams according to the present invention are mounted at opposite ends thereof to end plates. In one example, the end plates include slits into which the webs of the beams can be received. The resilient web according to the present invention is conveniently made from a unitary piece of material such as, for example, steel.
    Type: Application
    Filed: April 4, 2001
    Publication date: May 9, 2002
    Inventors: Ralph D. McGrath, John C. Chen
  • Publication number: 20020037968
    Abstract: The present invention relates to compositions and preparative process of partially or fully neutralized mixtures of carboxylate functionalized ethylene high copolymers or terpolymers (Mw between 80,000 and 500,000) with carboxylate functionalized ethylene low copolymers (Mw between 2,000 and 30,000) and organic acid salts and injection or compression molded applications such as golf ball components thereof.
    Type: Application
    Filed: August 8, 2001
    Publication date: March 28, 2002
    Inventor: John C. Chen
  • Patent number: 5891075
    Abstract: A wound dressing that releases, via hydrolysis and in a controlled manner, acetic acid when subjected to body temperatures and moisture, and is made from a cellulose ester substrate with a partial solvent thereon.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: April 6, 1999
    Assignee: Celanese Acetate LLC
    Inventors: John C. Chen, Lance J. Deutsch, Paul M. Garrett
  • Patent number: 5685832
    Abstract: A wound dressing that releases, via hydrolysis and in a controlled manner, acetic acid when subjected to body temperatures and moisture, and is made from a cellulose ester substrate with a partial solvent thereon.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: November 11, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: John C. Chen, Lance J. Deutsch, Paul M. Garrett
  • Patent number: 5559181
    Abstract: Self-stabilized resin latexes are provided which contain sulfonate salts produced by basic hydrolysis of chlorosulfonated C.sub.2 C.sub.8 alpha-olefin polymers having chlorine contents of 20-70 weight percent and sulfur contents of 1.5-10 weight percent. Further provided is a novel composition comprising a chlorosulfonated graft-modified ethylene/propylene copolymer.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 24, 1996
    Assignee: E. I. du Pont De Nemours and Company
    Inventor: John C. Chen
  • Patent number: 5491191
    Abstract: Self-stabilized resin latexes are provided which contain sulfonate salts produced by basic hydrolysis of chlorosulfonated C.sub.2 -C.sub.8 alpha-olefin polymers having chlorine contents of 20-70 weight percent and sulfur contents of 1.5-10 weight percent. Further provided is a novel composition comprising a chlorosulfonated graft-modified ethylene/propylene copolymer.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: February 13, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John C. Chen
  • Patent number: 5433227
    Abstract: A new and improved hand-held dental floss applicator apparatus includes a central body assembly, four finger assemblies projecting from the central body assembly, and four dental floss receiving assemblies connected to the respective four finger assemblies. Each of the respective dental floss receiving assemblies is formed as a notch in a respective finger assembly. The central body assembly lies in a first plane. A respective first portion of each of the respective finger assemblies projects from the central body assembly and is co-planar with the central body assembly. A respective second portion of each of the respective finger assemblies projects from each of the respective first portions and includes an end portion that lies in a second plane that is substantially perpendicular to the first plane. The central body assembly includes two opposed dental floss receiving channels. The dental floss receiving channels are formed as indentations adjacent to flange portions formed in the central body assembly.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: July 18, 1995
    Inventor: John C. Chen
  • Patent number: 5418055
    Abstract: The present invention is directed to a refrigeration cabinet comprising an interior liner, a foam insulation derived from an HHC blowing agent and an outer wall. The interior liner comprises a styrene-based inner layer, an adhesive layer, and a barrier layer. The adhesive layer comprises an ethylene copolymer grafted with an anhydride or carboxylic acid moiety, and a styrene-based polymer or copolymer. The barrier layer comprises an ethylene vinyl alcohol copolymer.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: May 23, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John C. Chen, Anita N. Diandreth
  • Patent number: 5260371
    Abstract: The present invention relates generally to toughened ethylene vinyl alcohol ("EVOH") compositions having improved melt processing stability. More specifically, the EVOH compositions comprise anhydride-modified polyolefin toughening resin and a stabilizer system comprising a basic inorganic compound. In the preferred embodiment, the toughening resin and basic inorganic compound are melt blended in a first step and later melt blended with the EVOH composition in a second step.
    Type: Grant
    Filed: August 25, 1992
    Date of Patent: November 9, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John C. Chen
  • Patent number: 5234989
    Abstract: Self-stabilized resin latexes are provided which contain carboxylate salts of post-chlorinated ethylene copolymers having chlorine contents of 20-60 weight percent. The ethylene copolymer salts are derived from ethylene/acrylic acid or ethylene/methacrylic acid copolymers containing 1.5-12 mole percent copolymerized units of acrylic or methacrylic acid. The latexes are particularly useful for preparing resorcinol formaldehyde adhesives.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: August 10, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John C. Chen, Royce E. Ennis
  • Patent number: 5219665
    Abstract: A multiple layer article of a thermoformable structural polymeric layer which is susceptible to damage upon exposure to hydrohalocarbon blowing agents and a polymeric layer which is a barrier to such hydrohalocarbon blowing agents provides a useful refrigerator liner. Related structures are useful for preventing the migration of hydrohalocarbons.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: June 15, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John C. Chen, Anita N. DiAndreth
  • Patent number: 5192468
    Abstract: The invention relates to a process for flash-spinning plexifilamentary film-fibril strands of polymers that are substantially plasticizable in carbon dioxide and/or water and have a melting point less than 300.degree. C. More particularly, the strands are flash-spun from mixtures of carbon dioxide, water and the polymer. The invention also relates to the film-fibril strands produced by the inventive process.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: March 9, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Don M. Coates, Carl K. McMillin, John C. Chen
  • Patent number: 5130364
    Abstract: A composition for use as a binder for coating compositions containing a chlorine-containing polymer having a chlorine content of 40-75 weight percent and a number average molecular weight of 3500-40,000 and an acrylic star polymer and a low molecular weight plasticizer that is a chlorinated aliphatic hydrocarbon having a chlorine content of 20-70 weight percent or a monomeric or polymer ester having molecular weights of from 200-2500.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: July 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John C. Chen
  • Patent number: 5102946
    Abstract: A stabilized chlorinated resin latex comprising a mixture in water of A) 50-95 wt. %, based on the weight of A and B, of a chlorinated resin, substantially free of acid moieties, having a chlorine content of 15-70 wt. %, and B) 5-50 wt. %, based on the weight of A and B, of a salt of a water-insoluble C.sub.2 -C.sub.12 alpha, beta- unsaturated olefin copolymer which contains at least 2 mole % acid moieties and is compatible with the chlorinated resin.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: April 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John C. Chen, Royce E. Ennis
  • Patent number: 4778856
    Abstract: A polymer composition comprising (a) 35-65 parts by weight polyvinyl chloride, (b) 10-55 parts by weight chlorinated polyethylene or chlorosulfonated polyethylene elastomer or mixtures thereof containing 24-40 weight percent chlorine, (c) 10-55 parts by weight of a chlorinated polyethylene or chlorosulfonated polyethylene elastomer or mixtures thereof containing 40-52 weight percent chlorine with the proviso that the chlorine level of the elastomers (b) and (c) differ by at least 5 weight percent, and (d) 1-30 parts by weight per 100 parts by weight of total chlorinated polymers (a), (b) and (c) of an ethylene terpolymer containing 48-74 weight percent ethylene, 20-40 weight percent vinyl acetate or alkyl acrylate wherein the alkyl group contains 1-10 carbon atoms, and 6-14 weight percent carbon monoxide. Such compositions are useful as pond liners, roofing membranes, wire and cable covering, and window profiles.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: October 18, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John C. Chen, Richard T. Chou
  • Patent number: 4727114
    Abstract: It has been found that if two different chlorosulfonated polyethylenes, each with its own specific selected chlorine and sulfur content range, are blended with polyvinyl chloride, the resulting three-phase blend has good oil resistance and low temperature toughness.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: February 23, 1988
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: John C. Chen
  • Patent number: 4634530
    Abstract: A process for chemically modifying a preformed polybenzimidazole semipermeable membrane is provided. The process comprises the steps of sulfonating the membrane by contacting the membrane at a temperature within the range of 5.degree. C. to 100.degree. C. with a sulfonating agent and heating the membrane in an inert atmosphere at a temperature and for a period of time sufficient to convert the ionic bonds formed in the contacting step to permanent, covalent bonds, thereby providing a covalently bonded sulfonated polybenzimidazole semipermeable membrane. The membrane produced by the process of the present invention exhibits cation selectivity for electrodialysis and electrochemical applications. Other advantages may include increased water flux for reverse osmosis purposes and increased resistance to fouling.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: January 6, 1987
    Assignee: Celanese Corporation
    Inventors: James E. Kuder, John C. Chen
  • Patent number: 4296058
    Abstract: The present invention provides an improvement in a process for providing a dyed, false twist texturized, fibrous material comprising at least 85 mole percent polyethylene terephthalate which is subject to variations in dye uptake induced by the false twist texturizing treatment conducted on said fibrous material prior to or concurrently with a dyeing process by enhancing the uniformity of dye uptake of the fibrous material. The enhancement in the uniformity of dye uptake is achieved by subjecting the fibrous material, which has been previously oriented but prior to false twist texturizing, to an annealing step at a specifically defined temperature for a specifically defined length of time while controlling the length of the fibrous material in a specifically defined manner.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: October 20, 1981
    Assignee: Celanese Corporation
    Inventors: John C. Chen, Herbert L. Davis
  • Patent number: 4290987
    Abstract: The present invention provides a process for preparing microporous hollow fibers by solvent stretching a non-porous hollow precursor fiber having a controlled degree of molecular orientation as measured by birefringence. Control of the precursor fiber orientation, yields a microporous hollow fiber having an improved balance of mechanical strength and permeability.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: September 22, 1981
    Assignee: Celanese Corporation
    Inventors: John W. Soehngen, John C. Chen