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).
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Publication number: 20240315249Abstract: The present disclosure discloses a disinfectant and a disinfection method for effectively killing endospores. The disinfectant includes a certain amount of polyhexamethylene biguanide as an active ingredient to kill endospores of Bacillus subtilis var. niger. The disinfectant can effectively kill endospores at room temperature and the atmospheric pressure. The disinfectant can be used for disinfection in environments including hospitals, crowded places, enclosed spaces, public transportation, and livestock and poultry breeding farms.Type: ApplicationFiled: January 23, 2024Publication date: September 26, 2024Inventors: Lei ZHANG, Kewang LU, David LUK, Jie WEI, Xiaojun SHI
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Publication number: 20240156903Abstract: 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: ApplicationFiled: February 13, 2023Publication date: May 16, 2024Applicants: Kunming Lanchie Dental Hospital, LTD., Kunming Yeshui Bio-Tech, LTD.Inventors: Yun Xu, Lei Zhang, Yang Song, Kewang Lu, David Luk
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Publication number: 20240122844Abstract: The present disclosure relates to a carrier for sustained-release of a drug and use thereof. The carrier is used to carry a drug. The carrier is in a gel state, a semi-solid state, or a solid state. The carrier includes a polyol fatty acid ester as a main component and a hydrogenated vegetable oil dissolved in the polyol fatty acid ester. The state of the sustained-release carrier can be adjusted by adjusting the amount of the dissolved hydrogenated vegetable oil.Type: ApplicationFiled: August 15, 2023Publication date: April 18, 2024Inventors: Lei ZHANG, Kewang LU, Yu SUN, Tuojiang WU, Xiaojun SHI, Ling ZHU, Jie WEI, Yang SONG, DAVID LUK
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Publication number: 20240024207Abstract: Provided are an application of a citrate metal salt in endodontic treatment, and a formulation obtained by preparation; said citrate metal salt is used for removing a tarnished layer, and the citrate metal salt is lithium citrate, sodium citrate, potassium citrate, or magnesium citrate. The citrate metal salt is co-formulated with a citrate metal salt-compatible single-chain cationic antimicrobial agent, achieving results that are currently achieved only by alternating rinsing with EDTA-containing and sodium hypochlorite preparations in endodontic treatment.Type: ApplicationFiled: July 19, 2021Publication date: January 25, 2024Inventors: Lei ZHANG, Yu SUN, Kewang LU, Yang SONG, Yangfangyuan LONG
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Patent number: 11576947Abstract: 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: GrantFiled: May 24, 2019Date of Patent: February 14, 2023Assignees: Kunming Lanchie Dental Hospital, LTD., Kunming Yeshal Bio-Tech, LTD.Inventors: Yun Xu, Lei Zhang, Yang Song, Kewang Lu
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Publication number: 20200306344Abstract: 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: ApplicationFiled: May 24, 2019Publication date: October 1, 2020Inventors: Yun Xu, Lei Zhang, Yang Song, Kewang Lu
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Patent number: 9132111Abstract: 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: GrantFiled: May 13, 2011Date of Patent: September 15, 2015Inventors: Kewang Lu, Hoshun Luk, Lei Zhang
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Publication number: 20120289575Abstract: 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: ApplicationFiled: May 13, 2011Publication date: November 15, 2012Inventors: Kewang Lu, Hoshun Luk, Lei Zhang
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Publication number: 20120228893Abstract: 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: ApplicationFiled: March 8, 2011Publication date: September 13, 2012Inventors: Kewang Lu, Rodney Erbe, Dazhi Lu, Wei Hai Kong
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Publication number: 20090118352Abstract: 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: ApplicationFiled: October 29, 2008Publication date: May 7, 2009Applicant: ESAWTECH, LTD.Inventors: Kewang Lu, Qiong Gong Ning, Lei Zhang
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Patent number: 6500879Abstract: 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: GrantFiled: June 15, 1994Date of Patent: December 31, 2002Assignee: Dentsply Research & Development Corp.Inventors: Chin-Teh Huang, Kewang Lu, Mingxin Fan, Paul Hammesfahr
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Publication number: 20020103272Abstract: 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 1Type: ApplicationFiled: April 2, 2002Publication date: August 1, 2002Applicant: DENTSPLY DeTrey GmbHInventors: Joachim E. Klee, Uwe Walz, Kewang Lu
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Patent number: 6391940Abstract: 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: GrantFiled: June 29, 1999Date of Patent: May 21, 2002Assignee: Dentsply Research & Development Corp.Inventors: Gordon Brian Blackwell, Kewang Lu, Chin-Teh Huang, Mingxin Fan, Paul D. Hammesfahr, Xiuling Wang, Junjie Sang
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Publication number: 20020058726Abstract: 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: ApplicationFiled: January 10, 2002Publication date: May 16, 2002Applicant: DENTSPLAY DeTrey GmbHInventors: Joachim E. Klee, Uwe Walz, Kewang Lu
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Patent number: 6387980Abstract: 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: GrantFiled: November 29, 2000Date of Patent: May 14, 2002Assignee: Dentsply Research & Development Corp.Inventors: Kewang Lu, Paul D. Hammesfahr
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Publication number: 20010051671Abstract: 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: ApplicationFiled: November 29, 2000Publication date: December 13, 2001Inventors: Kewang Lu, Paul D. Hammesfahr
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Patent number: 6211264Abstract: 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: GrantFiled: July 12, 1999Date of Patent: April 3, 2001Assignee: Dentsply Research & Development Corp.Inventors: Kewang Lu, Paul D. Hammesfahr
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Patent number: 6191190Abstract: 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: GrantFiled: May 18, 1998Date of Patent: February 20, 2001Assignee: Dentsply Research & Development Corp.Inventors: Gordon Brian Blackwell, Kewang Lu, Chin-Teh Huang, Mingxin Fan, Paul D. Hammesfahr
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Patent number: 5981620Abstract: 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: GrantFiled: October 17, 1997Date of Patent: November 9, 1999Assignee: Dentsply Research & Development Corp.Inventors: Paul D. Hammesfahr, Kewang Lu, Paul A. Silver
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Patent number: 5973022Abstract: 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: GrantFiled: November 1, 1996Date of Patent: October 26, 1999Assignee: DENTSPLY Research & Development Corp.Inventors: Kewang Lu, Paul D. Hammesfahr