Patents by Inventor Weitao Jia

Weitao Jia 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).

  • Patent number: 6730715
    Abstract: A curable dental restorative composition comprising about 1 to about 90 wt %, based on the total weight of the composition, of a filler component, the filler component comprising about 10 to 100 wt %, based on the total weight of the filler component, of a surface reactive glass component; about 1 to about 50 wt %, based on the total weight of the composition, of water; and about 10 to about 97 wt %, based on the total weight of the composition, of a curable organic component, comprising about 50 to about 99 wt %, based on the total weight of the curable organic component, of an ethylenically unsaturated resin component, about 1 to about 50 wt %, based on the total weight of the curable organic component, of an ethylenically unsaturated phosphoric acid ester; and about 0.01 to about 5 wt % of a curing system.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: May 4, 2004
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Weitao Jia
  • Publication number: 20040014009
    Abstract: A method for etching and treating a tooth surface prior to restoration, comprising a solution comprising of an —SO3 terminated compound resin, such as an —SO3H compound resin, and an aldehyde desensitizing compound. In practice, the composition is applied to the tooth surface and not subsequently washed prior to application of an adhesive or other restorative material.
    Type: Application
    Filed: February 10, 2003
    Publication date: January 22, 2004
    Inventors: Weitao Jia, Bruce Alpert, Martin L. Schulman
  • Patent number: 6653365
    Abstract: A dental composite material that comprises a polymerizable resin composition; a filler system comprising polyhedral oligomeric silsesquioxane fillers; and a curing system. The dental composite material is useful for a variety of dental materials, treatments, and restorative functions including crown and bridge materials, fillings, adhesives, sealants, luting agents or cements, denture base materials, orthodontic materials and sealants, and other dental restorative materials.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: November 25, 2003
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Weitao Jia
  • Patent number: 6648645
    Abstract: A ceramic tape is provided in its green state so that it is malleable and formable to a mold for forming a dental restoration, but will not break or crack as it is applied to the mold. Pressure may be applied to further form or adapt the ceramic tape to the shape of the mold. Heat is applied simultaneously with pressure or in a separate step to achieve high density and strength in the ceramic material. A vacuum atmosphere may be used with the application of pressure and/or heat. One or more layers of surface material such as porcelain or composite resin may be applied to the ceramic to form the dental restoration. The process is useful in the manufacture of dental materials or restorations including but not limited to orthodontic appliances, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, posts, teeth, jackets, inlays, onlays, facing, veneers, facets, implants, abutments, cylinders, and connectors.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: November 18, 2003
    Assignee: Jeneric/Pentron Incorporated
    Inventors: Joseph A. MacDougald, Carlino Panzera, Weitao Jia, Dmitri Brodkin, Martin L. Schulman, Paul Panzera, Bruce Alpert
  • Publication number: 20030212194
    Abstract: A dental restorative composition comprises about 35 to about 43 wt %, based on the total dental restorative composition, of a polymerizable, ethylenically unsaturated resin composition, wherein the resin composition comprises, based on the resin composition alone, about 25 to about 35 wt % PCDMA, about 40 to about 50 wt % EBP-DMA, about 18 to about 28 wt % Bis-GMA, and about 55 to about 70 wt %, based on the total dental restorative composition, of a filler system, wherein the filler system comprises a silanized barium glass containing about 20 to about 60 wt % barium oxide based on the weight of silanized barium glass. Such dental restorative compositions display an ability to flow under ambient conditions and this increases their utility where improved flexural strength and ease of application is desired.
    Type: Application
    Filed: May 8, 2002
    Publication date: November 13, 2003
    Inventor: Weitao Jia
  • Publication number: 20030207960
    Abstract: A self-etching, priming dental adhesive composition comprises an olefinically unsaturated monomer having an —SO3 functionality; a copolymerizable multi-functional (meth)acrylate adhesive; and a curing system. The self-etching, priming dental adhesive may further comprise a copolymerizable adhesion promoter containing an acid functionality, the adhesion promoter being different from the olefinically unsaturated monomer having an —SO3 functionality and the copolymerizable multi-functional (meth)acrylate adhesive, and a solvent system in an amount effective to dissolve the adhesive and/or the adhesion promoter. The adhesive composition provides even further advantages over the art, as all etching, priming, and application of an adhesive can be performed in one step.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 6, 2003
    Inventor: Weitao Jia
  • Publication number: 20030157034
    Abstract: A gel composition for use in etching the surfaces of teeth in preparation for prophylaxis, repair, or restoration, comprising an aqueous solution of an effective quantity of an acid; and a colloidal silica sol, wherein the silica portion of the sol comprises from about 3 to about 20 weight percent of the total etchant composition.
    Type: Application
    Filed: January 21, 2003
    Publication date: August 21, 2003
    Inventors: Weitao Jia, Shuhua Jin
  • Publication number: 20030134933
    Abstract: A two-part self-curing endodontic sealing system comprises a thiourea derivative, such as acetyl thiourea, and a hydroperoxide, such as cumene hydroperoxide. The thiourea derivative is used as a reducing agent and the hydroperoxide is used as an oxidizing agent.
    Type: Application
    Filed: September 20, 2002
    Publication date: July 17, 2003
    Inventors: Shuhua Jin, Weitao Jia
  • Patent number: 6592372
    Abstract: A method for etching and treating a tooth surface prior to restoration, comprising a solution comprising of an —SO3 terminated compound resin, such as an —SO3H compound resin, and an aldehyde desensitizing compound. In practice, the composition is applied to the tooth surface and not subsequently washed prior to application of an adhesive or other restorative material.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: July 15, 2003
    Assignee: Jeneric/Pentron Incorporated
    Inventors: Weitao Jia, Bruce Alpert, Martin L. Schulman
  • Publication number: 20030124483
    Abstract: An dental filling material comprising a thermoplastic polymer. The thermoplastic polymer may be biodegradable. A bioactive substance may also be included in the filling material. The thermoplastic polymer acts as a matrix for the bioactive substance. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
    Type: Application
    Filed: November 26, 2002
    Publication date: July 3, 2003
    Inventors: Weitao Jia, Bruce Alpert
  • Publication number: 20030125444
    Abstract: A dental resin composition is disclosed, comprising a polycarbonate-modified diphenoxy diacrylate having a monomer structure (I): 1
    Type: Application
    Filed: November 4, 2002
    Publication date: July 3, 2003
    Inventors: Weitao Jia, Shuhua Jin
  • Publication number: 20030113686
    Abstract: An endodontic filling material comprising a biodegrable thermoplastic polymer. A bioactive substance may also be included in the filling material. The thermoplastic polymer acts as a matrix for the bioactive substance. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
    Type: Application
    Filed: October 24, 2002
    Publication date: June 19, 2003
    Inventors: Weitao Jia, Bruce Alpert
  • Publication number: 20030083400
    Abstract: A curable dental restorative composition comprising about 1 to about 90 wt %, based on the total weight of the composition, of a filler component, the filler component comprising about 10 to 100 wt %, based on the total weight of the filler component, of a surface reactive glass component; about 1 to about 50 wt %, based on the total weight of the composition, of water; and about 10 to about 97 wt %, based on the total weight of the composition, of a curable organic component, comprising about 50 to about 99 wt %, based on the total weight of the curable organic component, of an ethylenically unsaturated resin component, about 1 to about 50 wt %, based on the total weight of the curable organic component, of an ethylenically unsaturated phosphoric acid ester; and about 0.01 to about 5 wt % of a curing system.
    Type: Application
    Filed: July 8, 2002
    Publication date: May 1, 2003
    Inventor: Weitao Jia
  • Patent number: 6537563
    Abstract: A gel composition for use in etching the surfaces of teeth in preparation for prophylaxis, repair, or restoration, comprising an aqueous solution of an effective quantity of an acid; and a colloidal silica sol, wherein the silica portion of the sol comprises from about 3 to about 20 weight percent of the total etchant composition.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: March 25, 2003
    Assignee: Jeneric/Pentron, Inc.
    Inventors: Weitao Jia, Shuhua Jin
  • Publication number: 20030015667
    Abstract: A curing/whitening unit provides a light guide and a conduit for delivering a source of cooling fluid to or near the surface being cured as radiant energy of a light beam is directed on the material to be cured. An outlet for the cooling fluid is provided integral the curing unit proximate the outlet or tip of the light guide of the curing unit to provide simultaneous cooling fluid to the mouth as curing or whitening is occurring.
    Type: Application
    Filed: July 18, 2002
    Publication date: January 23, 2003
    Inventors: Joseph A. MacDougald, Daniel P. Clark, Weitao Jia, George Zychek
  • Publication number: 20020198282
    Abstract: A dental composite material that comprises a polymerizable resin composition; a filler system comprising polyhedral oligomeric silsesquioxane fillers; and a curing system. The dental composite material is useful for a variety of dental materials, treatments, and restorative functions including crown and bridge materials, fillings, adhesives, sealants, luting agents or cements, denture base materials, orthodontic materials and sealants, and other dental restorative materials.
    Type: Application
    Filed: April 30, 2002
    Publication date: December 26, 2002
    Inventor: Weitao Jia
  • Patent number: 6455608
    Abstract: Curable compositions comprising degradable macromonomers having one or more terminal acrylate or methacrylate functionality, a curing composition, and optionally one or more polymerizable acrylate or methacrylate comonomers. Degradable macromonomers are manufactured from cyclic monomers with compounds having acrylate or methacrylate functionality. Depending on their use, the degradable macromonomer compositions further comprise one or more organic or inorganic fillers, including a calcium-based compound and/or a radiopacity-imparting agent. The compositions are particularly suitable for root canal sealants, implants, and pulp capping materials.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: September 24, 2002
    Assignee: Jeneric/Pentron Incorporated
    Inventors: Weitao Jia, Shuhua Jin, Samuel Jien-shek Huang
  • Publication number: 20020120033
    Abstract: Curable compositions comprising degradable macromonomers having one or more terminal acrylate or methacrylate functionality, a curing composition, a filler composition comprising bioactive particles of bioactive glass, bioactive glass-ceramics, calcium phosphates, calcium apatites, or mixtures thereof and optionally one or more polymerizable acrylate or methacrylate comonomers. Degradable macromonomers are manufactured from cyclic monomers with compounds having acrylate or methacrylate functionality. Depending on their use, the degradable macromonomer compositions further comprise one or more organic or inorganic fillers, including a calcium-based compound and/or a radiopacity-imparting agent. The compositions are particularly suitable for root canal sealants, implants, bone cements, and pulp capping materials.
    Type: Application
    Filed: December 5, 2001
    Publication date: August 29, 2002
    Inventors: Weitao Jia, Shuhua Jin
  • Publication number: 20020119426
    Abstract: A method for etching and treating a tooth surface prior to restoration, comprising a solution comprising of an —SO3 terminated compound resin, such as an —SO3H compound resin, and an aldehyde desensitizing compound. In practice, the composition is applied to the tooth surface and not subsequently washed prior to application of an adhesive or other restorative material.
    Type: Application
    Filed: May 11, 2001
    Publication date: August 29, 2002
    Inventors: Weitao Jia, Bruce Alpert, Martin L. Schulman
  • Patent number: 6417246
    Abstract: A polymerizable dental composition, comprising a polymerizable resin composition; and a filler composition comprising a bound, nanostructured colloidal silica
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: July 9, 2002
    Assignee: Jenerica/Pentron Incorporated
    Inventors: Weitao Jia, Shuhua Jin