Patents by Inventor Joshua Friedman

Joshua Friedman 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: 7015423
    Abstract: A heating device into which a compule of dental material can be inserted to elevate the temperature of the dental material to above ambient temperature prior to clinical use having a base for housing a heating element, a temperature control mechanism for controlling the temperature of the heating element, a power connection for electrically connecting the temperature control mechanism to a source of power and a heating receptacle removably mounted on the base. The heating receptacle comprises a heating tray composed of a conductive material and an upstanding section extending from the heating tray and having a heating chamber open to the atmosphere which is adapted to receive one end of a conventional dispenser in which the compule of dental material is stored for raising the temperature of said dental material in said compule to an elevated temperature.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: March 21, 2006
    Inventor: Joshua Friedman
  • Publication number: 20060008762
    Abstract: A radiometer and method for providing an indication of the amount of time (exposure duration) needed to cause a light curable dental resin composite material to maximally polymerize in response to the application of light from any light-curing source during the preparation of a dental restoration. It describes a radiometer comprising a sample holder of a size designed to hold a sample equivalent of said dental light curable dental material such that the thickness of the sample of light curable material in the sample holder will correspond to the depth of the composite material in the dental restoration; a solid state light sensor; a microprocessor programmed to respond to the output voltage or change in electrical resistance of the light sensor based upon an algorithm defining a mathematical model representative of the change in light transmission through the light curable dental material as a function of the degree to which said light curable dental material is being polymerized.
    Type: Application
    Filed: July 9, 2004
    Publication date: January 12, 2006
    Inventor: Joshua Friedman
  • Publication number: 20050186531
    Abstract: A compule for storing dental composite material to be extruded from the compule using a standard dispenser in the preparation or repair of a dental restoration. The compule comprises: a cylindrical body having an orifice at one end thereof through which the dental composite material is extruded and a means at the opposite end thereof to facilitate the extrusion of said dental composite material using the dispenser. The body of the compule may be surrounded by an electrically conductive plastic or composed of a thermally and electrically conductive plastic having a thermal conductivity in the range of between 1.0 w/mk and 500 w/mk and electrical resistivity in the range 0.01-10,000 ohm-cm.
    Type: Application
    Filed: February 20, 2004
    Publication date: August 25, 2005
    Inventor: Joshua Friedman
  • Publication number: 20050186532
    Abstract: A compule for storing dental composite material to be extruded from the compule using a standard dispenser in the preparation or repair of a dental restoration. The compule comprises: a cylindrical body having an orifice at one end thereof through which the dental composite material is extruded and a means at the opposite end thereof to facilitate the extrusion of said dental composite material using the dispenser. The body of the compule is composed of an electrically conductive plastic or alternatively may be composed of a thermally and electrically conductive plastic having a thermal conductivity in the range of between 1.0 w/mk and 500 w/mk and an electrical resistivity in the range 0.01-10,000 ohm-cm.
    Type: Application
    Filed: November 13, 2004
    Publication date: August 25, 2005
    Inventor: Joshua Friedman
  • Patent number: 6908607
    Abstract: A dental bleaching gel composition having a long shelf life for use with an activator system to cause accelerated bleaching action over a shortened time period of a peroxide bleaching agent in the bleaching gel composition when applied upon a tooth surface for cosmetically whitening the tooth and/or for the treatment of stains or discolorations.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: June 21, 2005
    Assignee: AdDent Inc.
    Inventors: Abhijit Banerjee, Joshua Friedman
  • Publication number: 20040234921
    Abstract: A heating device into which a compule of dental material can be inserted to elevate the temperature of the dental material to above ambient temperature prior to clinical use having a base for housing a heating element, a temperature control mechanism for controlling the temperature of the heating element, a power connection for electrically connecting the temperature control mechanism to a source of power and a heating receptacle removably mounted on the base. The heating receptacle comprises a heating tray composed of a conductive material and an upstanding section extending from the heating tray and having a heating chamber open to the atmosphere which is adapted to receive one end of a conventional dispenser in which the compule of dental material is stored for raising the temperature of said dental material in said compule to an elevated temperature.
    Type: Application
    Filed: May 19, 2003
    Publication date: November 25, 2004
    Inventor: Joshua Friedman
  • Publication number: 20040053189
    Abstract: The elastomeric member of the present invention is a flexible light guide and curing aid, which permits pressure to be applied to a photo curable material during the clinical restoration of a tooth while simultaneously curing the material by exposing the photo curable material to light. The method of the present invention permits the high forces developed between the occlusal surfaces of opposing teeth when engaged to be utilized to create the applied pressure on the photo curable material. The elastomeric member is soft and has an optically transparent body with a first section having first and second opposing planar surfaces adapted for placement in lateral juxtaposition between the occlusal surfaces of opposing teeth of human dentition and a second section extending from the first section adapted to facilitate contact with a dental light guide while the opposing teeth are engaged.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 18, 2004
    Inventor: Joshua Friedman
  • Patent number: 6616448
    Abstract: A dispenser for controllably heating a compule of dental material removably inserted in the dispenser and for extruding dental material from the compule. The dispenser includes an elongated tubular barrel having a substantially semi-cylindrical front end to accommodate the body of the compule, a cavity at the front end of the dispenser open to the atmosphere and a slot disposed transverse to the longitudinal axis of the for accommodating an end flange of the compule when the compule is inserted into the dispenser. The dispenser further includes a plunger reciprocally mounted in the tubular barrel in alignment with the longitudinal axis of the cavity for engaging the compule to express dental material from said compule by means of a motorized assembly or manual control under the control of the operator and a heating unit disposed in the cavity at the front end of the dispenser for heating the compule.
    Type: Grant
    Filed: September 1, 2001
    Date of Patent: September 9, 2003
    Inventor: Joshua Friedman
  • Publication number: 20030118519
    Abstract: A dental bleaching gel composition having a long shelf life for use with an activator system to cause accelerated bleaching action over a shortened time period of a peroxide bleaching agent in the bleaching gel composition when applied upon a tooth surface for cosmetically whitening the tooth and/or for the treatment of stains or discolorations.
    Type: Application
    Filed: November 25, 2002
    Publication date: June 26, 2003
    Inventors: Abhijit Banerjee, Joshua Friedman
  • Patent number: 6554463
    Abstract: An optical waveguide concentrator and photocuring device with the optical waveguide concentrator having at least one solid optically transparent member for combining the output radiant energy from a plurality of optoelectronic light emitting devices mounted in a circular array facing the solid optically transparent member with the optically transparent member having an input surface, an output surface and a sloping surface intersecting the input and output surface to form an acute angle and with with each optoelectronic light emitting device having an optical axis directed parallel to or inclined relative to the longitudinal axis of the concentrator. The geometry of the solid optically transparent member may be conical or hyperbolic with the sloping surface tapered to form a tapered angle of between 5° and 15°.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: April 29, 2003
    Assignee: AdDent Inc.
    Inventors: Brian Hooker, Joshua Friedman
  • Patent number: 6511321
    Abstract: A dental device for assisting in the filling and curing of a dental restoration with light activated materials having a truncated conical shape with a disposable insert member at its apex. The conical holding device has an opening at the base to accommodate a light guide and an opening at the apex to accommodate a disposable insert member. Each insert member has a shape tapered at one end thereof and an indicator means to monitor the depth of the restoration to the pulpal floor and to provide alignment of the preparation relative to the marginal ridge of the adjacent tooth.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: January 28, 2003
    Assignee: Ad Dent Inc.
    Inventors: Richard Trushkowsky, Joshua Friedman
  • Patent number: 6485709
    Abstract: A dental bleaching gel composition having a long shelf life for use with an activator system to cause accelerated bleaching action of a peroxide bleaching agent in the bleaching gel composition when applied upon a tooth surface and to a method for applying and activating a dental bleaching gel upon a tooth surface for cosmetically whitening the tooth and/or for the treatment of stains or discolorations over a shortened time period. The dental bleaching gel has a pH independent thickening agent, a stabilizing agent for the peroxide bleaching agent and a FD & C approved dye.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: November 26, 2002
    Assignee: AdDent Inc.
    Inventors: Abhijit Banerjee, Joshua Friedman
  • Publication number: 20020141949
    Abstract: A dental bleaching gel composition having a long shelf life for use with an activator system to cause accelerated bleaching action of a peroxide bleaching agent in the bleaching gel composition when applied upon a tooth surface and to a method for applying and activating a dental bleaching gel upon a tooth surface for cosmetically whitening the tooth and/or for the treatment of stains or discolorations over a shortened time period. The dental bleaching gel has a pH independent thickening agent, a stabilizing agent for the peroxide bleaching agent and a FD & C approved dye.
    Type: Application
    Filed: January 23, 2001
    Publication date: October 3, 2002
    Inventors: Abhijit Banerjee, Joshua Friedman
  • Publication number: 20020058231
    Abstract: A dispenser for controllably heating a compule of dental material removably inserted in the dispenser and for extruding dental material from the compule. The dispenser includes an elongated tubular barrel having a substantially semi-cylindrical front end to accommodate the body of the compule, a cavity at the front end of the dispenser open to the atmosphere and a slot disposed transverse to the longitudinal axis of the for accommodating an end flange of the compule when the compule is inserted into the dispenser. The dispenser further includes a plunger reciprocally mounted in the tubular barrel in alignment with the longitudinal axis of the cavity for engaging the compule to express dental material from said compule by means of a motorized assembly or manual control under the control of the operator and a heating unit disposed in the cavity at the front end of the dispenser for heating the compule.
    Type: Application
    Filed: September 1, 2001
    Publication date: May 16, 2002
    Inventor: Joshua Friedman
  • Publication number: 20020051367
    Abstract: An optical waveguide concentrator and photocuring device with the optical waveguide concentrator having at least one solid optically transparent member for combining the output radiant energy from a plurality of optoelectronic light emitting devices mounted in a circular array facing the solid optically transparent member with the optically transparent member having an input surface, an output surface and a sloping surface intersecting the input and output surface to form an acute angle and with with each optoelectronic light emitting device having an optical axis directed parallel to or inclined relative to the longitudinal axis of the concentrator. The geometry of the solid optically transparent member may be conical or hyperbolic with the sloping surface tapered to form a tapered angle of between 5° and 15°.
    Type: Application
    Filed: August 6, 2001
    Publication date: May 2, 2002
    Inventors: Brian Hooker, Joshua Friedman
  • Patent number: 6320162
    Abstract: The present invention is a method for enhancing the cure of photocurable dental restorative composite(s) containing unreactive monomer(s) and filler upon exposure to light radiation comprising the steps of preheating the photocurable dental restorative composite(s) to an elevated temperature above ambient prior to said exposure to light radiation during clinical usage. The heating assembly of the present invention may be used to preheat any dental material(s) stored in one or more compules to an elevated temperature above ambient prior to clinical usage.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: November 20, 2001
    Inventor: Joshua Friedman
  • Patent number: 6312254
    Abstract: A dispenser for controllably heating a compule of dental material removably inserted in the dispenser and for extruding dental material from the compule. The dispenser includes an elongated tubular barrel having a substantially semi-cylindrical front end to accommodate the body of the compule, a cavity at the front end of the dispenser open to the atmosphere and a slot disposed transverse to the longitudinal axis of the for accommodating an end flange of the compule when the compule is inserted into the dispenser. The dispenser further includes a housing having one end connected to the tubular barrel and an opposite end having an extended handle in the form of a pistol grip, a plunger reciprocally mounted in the tubular barrel having a piston extending in alignment with the longitudinal axis of the cavity and a manually movable lever arm coupled to the plunger by means of a rack and pinion mechanism to dispense dental material from from the dispenser.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: November 6, 2001
    Inventor: Joshua Friedman
  • Patent number: 6236020
    Abstract: The present invention is a method for enhancing the cure of photocurable dental restorative composite(s) containing unreactive monomer(s) and filler upon exposure to light radiation comprising the steps of preheating the photocurable dental restorative composite(s) to an elevated temperature above ambient prior to said exposure to light radiation during clinical usage. The heating assembly of the present invention may be used to preheat any dental material(s) stored in one or more compules to an elevated temperature above ambient prior to clinical usage.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: May 22, 2001
    Inventor: Joshua Friedman
  • Patent number: 5371826
    Abstract: A fiber optic light guide for forming a concentrated high intensity light, comprising a multiplicity of fiber optic strands bundled together, with each strand uniformly tapered to form an elongated tapered section having a cumulative taper of less than five degrees (<5.degree.) and a curved section extending distally from said elongated tapered section.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: December 6, 1994
    Assignee: Demetron Research Corp.
    Inventor: Joshua Friedman
  • Patent number: 5290169
    Abstract: The optical light guide of the present invention is composed of a solid, transparent material selected from the class consisting of glass, acrylic, polystyrene, and polycarbonate. The light guide has a head, a tapered section and a curved section. The head has a light-receiving, concave surface geometry at the proximal end of the light guide.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: March 1, 1994
    Inventors: Joshua Friedman, Brian Dell