Patents by Inventor Kewang Lu

Kewang Lu 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: 20200306344
    Abstract: The present invention relates to oral composition and the method of preparation and use of such composition for inhibiting, reducing, and/or disrupting oral biofilm. The composition comprises a stabilizing matrix, a cationic biocide, and a peroxide source.
    Type: Application
    Filed: May 24, 2019
    Publication date: October 1, 2020
    Inventors: Yun Xu, Lei Zhang, Yang Song, Kewang Lu
  • Patent number: 9132111
    Abstract: Disclosed are topical antimicrobial compositions. The compositions are useful for disinfecting and treating microbial infections of the skin or mucosa of humans and animals.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: September 15, 2015
    Inventors: Kewang Lu, Hoshun Luk, Lei Zhang
  • Publication number: 20120289575
    Abstract: Disclosed are topical antimicrobial compositions. The compositions are useful for disinfecting and treating microbial infections of the skin or mucosa of humans and animals.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 15, 2012
    Inventors: Kewang Lu, Hoshun Luk, Lei Zhang
  • Publication number: 20120228893
    Abstract: The present invention relates to a bed extender for extending and enlarging the carrying capacity of the bed of a pickup truck and some SUV pick-up style vehicles. The extender comprises of a tailgate containing two lateral side panels and a foldable bottom panel. The tailgate is pivotally attached on a U-shape frame which is fixed on supporting beams. The supporting beams are connected to the vehicles main beams underneath the vehicle bed through brackets and can horizontally move out and move in when needed.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 13, 2012
    Inventors: Kewang Lu, Rodney Erbe, Dazhi Lu, Wei Hai Kong
  • Publication number: 20090118352
    Abstract: The present invention relates to microbicidal and spermicidal compositions, methods and topical pharmaceutical compositions containing N-cocoyl amino acid pyrrolidone carboxylates (N-cocoyl amino acid pyrrolidone salts, CAPS) as active ingredients. The invention is for the prevention and control of sexually transmitted diseases and for the prevention of pregnancy. The microbicidal spectrum of the invention includes various STD pathogens, HIV viruses as well as gram positive and negative bacteria, and yeasts. Spermicidal barriers containing the compositions are also provided. The N-cocoyl amino acid pyrrolidone salts is represented by the formula: Wherein A is an amino acid residue and R is a C.sub.1O-C.sub.
    Type: Application
    Filed: October 29, 2008
    Publication date: May 7, 2009
    Applicant: ESAWTECH, LTD.
    Inventors: Kewang Lu, Qiong Gong Ning, Lei Zhang
  • Patent number: 6500879
    Abstract: The invention provides dental cement compositions and methods of using them for binding hard tooth material, metal and ceramic. The cement compositions include shelf stable complexes of ethylenically unsaturated monomers reacted with cations. The cements have superior adhesion to tooth without separately acid etching dentin or enamel. Compositions of are useful as dental luting cements, liners, pit and fissure seal bases and restoratives.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: December 31, 2002
    Assignee: Dentsply Research & Development Corp.
    Inventors: Chin-Teh Huang, Kewang Lu, Mingxin Fan, Paul Hammesfahr
  • Publication number: 20020103272
    Abstract: A self-curing dental adhesive has at least one polymerizable resin; at least one polymerizable monomer; at least one polymerizable monomer with an acidic moiety selected from the group 1
    Type: Application
    Filed: April 2, 2002
    Publication date: August 1, 2002
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz, Kewang Lu
  • Patent number: 6391940
    Abstract: A preferred embodiment of the invention provides a composition and method of treating dental metal. The composition includes a polymerizable aryl compound having at least one carboxylic acid group and at least one polymerizable group, and a polymerizable compound having at least one polymerizable group and at least one phosphorous containing group. A preferred composition includes at least 50 percent by weight of a volatile organic solvent, at least 15 percent by weight of one or more polymerizable acrylate compounds and an effective amount of a photoinitiator. At least a portion of the polymerizable compounds are multifunctional polymerizable compounds having at least three acrylate moieties. The polymerizable compounds are substantially soluble in the solvent. The composition is adapted to form a polymeric material which is adapted to adhere to metal and ceramics and to dentin. Compositions of the invention have superior adhesion to dental metals and tooth without separately acid etching dentin or enamel.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: May 21, 2002
    Assignee: Dentsply Research & Development Corp.
    Inventors: Gordon Brian Blackwell, Kewang Lu, Chin-Teh Huang, Mingxin Fan, Paul D. Hammesfahr, Xiuling Wang, Junjie Sang
  • Publication number: 20020058726
    Abstract: A method of restoring a tooth includes applying a dental adhesive to the tooth, wherein the dental adhesive is self-curing and includes a redox initiator.
    Type: Application
    Filed: January 10, 2002
    Publication date: May 16, 2002
    Applicant: DENTSPLAY DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz, Kewang Lu
  • Patent number: 6387980
    Abstract: The invention provides dental composition system having curable liquid which is useful alone as a light curable composition and which is useful by mixing with a powder in preselected proportions to form dual cure compositions. The composition system is useful as bonding agent, cement, liner, base, restorative, pit and fissure sealants, and/or core build-up material, having improved adhesion to dentin. After storing the powder and the liquid in separate containers for at least two weeks and then mixing a portion of the powder and a portion of the liquid to form a mixture, the polymerizable compound polymerizes within 20 minutes of the mixing to form a first polymeric material having a flexural strength of at least 50 MPa, and an expansion in water at 37° C. after 90 days of less than 1 percent by volume.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: May 14, 2002
    Assignee: Dentsply Research & Development Corp.
    Inventors: Kewang Lu, Paul D. Hammesfahr
  • Publication number: 20010051671
    Abstract: The invention provides dental composition system having curable liquid which is useful alone as a light curable composition and which is useful by mixing with a powder in preselected proportions to form dual cure compositions. The composition system is useful as bonding agent, cement, liner, base, restorative, pit and fissure sealants, and/or core build-up material, having improved adhesion to dentin. After storing the powder and the liquid in separate containers for at least two weeks and then mixing a portion of the powder and a portion of the liquid to form a mixture, the polymerizable compound polymerizes within 20 minutes of the mixing to form a first polymeric material having a flexural strength of at least 50 MPa, and an expansion in water at 37° C. after 90 days of less than 1 percent by volume.
    Type: Application
    Filed: November 29, 2000
    Publication date: December 13, 2001
    Inventors: Kewang Lu, Paul D. Hammesfahr
  • Patent number: 6211264
    Abstract: The invention provides dental composition system having curable liquid which is useful alone as a light curable composition and which is useful by mixing with a powder in preselected proportions to form dual cure compositions. The composition system is useful as bonding agent, cement, liner, base, restorative, pit and fissure sealants, and/or core build-up material, having improved adhesion to dentin. After storing the powder and the liquid in separate containers for at least two weeks and then mixing a portion of the powder and a portion of the liquid to form a mixture, the polymerizable compound polymerizes within 20 minutes of the mixing to form a first polymeric material having a flexural strength of at least 50 MPa, and an expansion in water at 37° C. after 90 days of less than 1 percent by volume.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: April 3, 2001
    Assignee: Dentsply Research & Development Corp.
    Inventors: Kewang Lu, Paul D. Hammesfahr
  • Patent number: 6191190
    Abstract: A composition and method of treating a dental tooth. The composition includes a polymerizable aryl compound having at least one carboxylic acid group and at least one polymerizable group, and a polymerizable compound having at least one polymerizable group and at least one phosphorous containing group. A preferred composition includes at least 50 percent by weight of a volatile organic solvent, at least 15 percent by weight of one or more polymerizable acrylate compounds and an effective amount of a photoinitiator. At least a portion of the polymerizable compounds are multifunctional polymerizable compounds having at least three acrylate moieties. The polymerizable compounds are substantially soluble in the solvent. The composition is adapted to form a polymeric material which is adapted to adhere to dentin. Compositions of the invention have superior adhesion to tooth without separately acid etching dentin or enamel.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: February 20, 2001
    Assignee: Dentsply Research & Development Corp.
    Inventors: Gordon Brian Blackwell, Kewang Lu, Chin-Teh Huang, Mingxin Fan, Paul D. Hammesfahr
  • Patent number: 5981620
    Abstract: The invention provides polymerizable dental, compounds, compositions, including the compounds and products for mixing the compositions and methods of using the compositions. Aryl acid compounds are provided in accordance with the invention. The compositions include at least one polymerizable aryl acid compound, an effective amount of a polymerization initiator, and at least 10 percent by weight of ceramic, metal and/or metal oxide filler particles having a particle size less than 500 microns. The dental products of the invention include a polymerizable composition in an enclosure having at least two chambers separated by a wall adapted to be ruptured prior to or during mixing of the composition. Compositions of the invention are preferred for use in these enclosures. Core build up material including a polymerizable acid containing compound is used to support dental crowns and adhere them to teeth in accordance with the invention.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: November 9, 1999
    Assignee: Dentsply Research & Development Corp.
    Inventors: Paul D. Hammesfahr, Kewang Lu, Paul A. Silver
  • Patent number: 5973022
    Abstract: The invention provides dental composition system having curable liquid which is useful alone as a light curable composition and which is useful by mixing with a powder in preselected proportions to form dual cure compositions. The composition system is useful as bonding agent, cement, liner, base, restorative, pit and fissure sealants, and/or core build-up material, having improved adhesion to dentin. After storing the powder and the liquid in separate containers for at least two weeks and then mixing a portion of the powder and a portion of the liquid to form a mixture, the polymerizable compound polymerizes within 20 minutes of the mixing to form a first polymeric material having a flexural strength of at least 50 MPa, and an expansion in water at 37.degree. C. after 90 days of less than 1 percent by volume.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: October 26, 1999
    Assignee: DENTSPLY Research & Development Corp.
    Inventors: Kewang Lu, Paul D. Hammesfahr
  • Patent number: 5955514
    Abstract: The invention provides dental cement compositions and methods of using them for binding hard tooth material, metal and ceramic. The cement compositions include shelf stable complexes of ethylenically unsaturated monomers reacted with cations. The cements have superior adhesion to tooth without separately acid etching dentin or enamel.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: September 21, 1999
    Assignee: Dentsply Research & Development Corp.
    Inventors: Chin-Teh Huang, Kewang Lu, Mingxin Fan, Paul Hammesfahr
  • Patent number: 5710194
    Abstract: The invention provides polymerizable dental, compounds, compositions, including the compounds and products for mixing the compositions and methods of using the compositions. Aryl acid compounds are provided in accordance with the invention. The compositions include at least one polymerizable aryl acid compound, an effective amount of a polymerization initiator, and at least 10 percent by weight of ceramic, metal and/or metal oxide filler particles having a particle size less than 500 microns. The dental products of the invention include a polymerizable composition in an enclosure having at least two chambers separated by a wall adapted to be ruptured prior to or during mixing of the composition. Compositions of the invention are preferred for use in these enclosures. Core build up material including a polymerizable acid containing compound is used to support dental crowns and adhere them to teeth in accordance with the invention.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: January 20, 1998
    Assignee: Dentsply Research & Development Corp.
    Inventors: Paul D. Hammesfahr, Kewang Lu, Paul A. Silver
  • Patent number: 5338773
    Abstract: The invention provides dental cement compositions and methods of using them for binding hard tooth material, metal and ceramic. The cement compositions include polymerizable acid reactive ethylenically unsaturated monomers, and a source of cations reactive therewith, to further crosslink the resulting polymer. The cements have superior adhesion to tooth without separately acid etching dentin or enamel. Compositions of are useful as dental luting cements, liners, bases and restoratives.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: August 16, 1994
    Assignee: Dentsply Research & Development Corp.
    Inventors: Kewang Lu, Chin-Teh Huang, Paul Hammesfahr