Patents by Inventor Paul R. Pierson

Paul R. Pierson 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: 20230013268
    Abstract: Described herein is a dental material applicator system comprising a segmented capsule and handpiece. The capsule separately holds a powder and a liquid such that upon activation in the handpiece by an operator, the powder and liquid are mixed into a paste. The operator then triggers the handpiece so that the mixed paste is extruded.
    Type: Application
    Filed: September 26, 2022
    Publication date: January 19, 2023
    Applicant: DENTSPLY SIRONA Inc.
    Inventors: PAUL R. PIERSON, CHRISTOPH WEBER, PETER MAX COVELESKI, KENNETH R. GUARAGNO, NAIM KARAZIVAN, JAMES SIRKIS
  • Patent number: 11478332
    Abstract: Described herein is a dental material applicator system comprising a segmented capsule and handpiece. The capsule separately holds a powder and a liquid such that upon activation in the handpiece by an operator, the powder and liquid are mixed into a paste. The operator then triggers the handpiece so that the mixed paste is extruded.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: October 25, 2022
    Assignee: DENTSPLY SIRONA INC.
    Inventors: Paul R Pierson, Christoph Weber, Peter Max Coveleski, Kenneth R Guaragno, Naim Karazivan, James Sirkis
  • Publication number: 20180250103
    Abstract: A motor driven dispenser for the motorized extrusion and precise placement of dental materials from impression material cartridges of different sizes. The dispenser includes nested plungers to reduce the length and width of the dispenser as well as a cap affixed to the dispenser housing which snaps over a cartridge flange of the impression material cartridges to retain it.
    Type: Application
    Filed: March 1, 2018
    Publication date: September 6, 2018
    Applicant: DENTSPLY SIRONA Inc.
    Inventors: Paul R. PIERSON, Joseph Reagan, Daniel W. Bartlett, Jeremy Kile
  • Publication number: 20180000561
    Abstract: Described herein is a dental material applicator system comprising a segmented capsule and handpiece. The capsule separately holds a powder and a liquid such that upon activation in the handpiece by an operator, the powder and liquid are mixed into a paste. The operator then triggers the handpiece so that the mixed paste is extruded.
    Type: Application
    Filed: March 7, 2016
    Publication date: January 4, 2018
    Applicant: Dentsply Sirona Inc.
    Inventors: Paul R. PIERSON, CHRISTOPH WEBER, PETER MAX COVELESKI, KENNETH R. GUARAGNO, NAIM KARAZIVAN, JAMES SIRKIS
  • Patent number: 9283059
    Abstract: Disclosed herein are a tissue management impression material and a method of application into the sulcus of a patient, whereby the tissue management impression material is a part of the final dental impression made when manufacturing a dental device, such as a crown.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: March 15, 2016
    Assignee: DENTSPLY International Inc.
    Inventors: Paul R. Pierson, Fuming Sun, Richard J Bennett, Robert Pieroni
  • Patent number: 8167509
    Abstract: A container enclosing an applicator and a dental composition including a volatile organic solvent. The container is sealed. The volatile organic solvent is effectively retained within the container, even after storage at about 43° C. for one week. Preferably the container is made of a copolymer of a cycloolefin and an open chain olefin.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: May 1, 2012
    Assignee: DENTSPLY International Inc.
    Inventors: Paul R. Pierson, Paul D. Hammesfahr
  • Patent number: 8052421
    Abstract: A dispensing syringe for dispensing a multi-component dental composition, preferably a two component composition, is provided. The syringe includes a syringe body with multiple elongated barrels for storing the components of the composition; a threaded plunger rod assembly; and a rotatable, threaded connector knob. Preferably, the syringe body has a double-barrel structure and the plunger rod assembly includes two plunger rods that slide within the barrels. The threaded knob has a through-bore with a continuous internal thread for engaging the outer threads of the first and second plunger rods. A dental practitioner manually rotates the knob to displace the first and second plunger rods and discharge the components. The dispensing syringe may further include a dispensing tip containing a static mixing element for mixing the components and dispensing the mixed composition.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: November 8, 2011
    Assignee: Dentsply International, Inc.
    Inventor: Paul R. Pierson
  • Publication number: 20110266165
    Abstract: The invention provides a container enclosing an applicator and a dental composition including a volatile organic solvent. The container is sealed. The volatile organic solvent is effectively retained within the container, even after storage at about 43° C. for one week. Preferably the container is made of a copolymer of a cycloolefin and an open chain olefin.
    Type: Application
    Filed: May 3, 2011
    Publication date: November 3, 2011
    Inventors: PAUL R. PIERSON, Paul D. Hammesfahr
  • Patent number: 7959370
    Abstract: A container enclosing an applicator and a dental composition including a volatile organic solvent. The container is sealed. The volatile organic solvent is effectively retained within the container, even after storage at about 43° C. for one week. Preferably the container is made of a copolymer of a cycloolefin and an open chain olefin.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: June 14, 2011
    Assignee: Dentsply International, Inc.
    Inventors: Paul R. Pierson, Paul D. Hammesfahr
  • Publication number: 20100167230
    Abstract: A heat pack 30 is provided which contains the reactants for an exothermic chemical reaction. The heat pack 30 having physical contact with or close physical proximity to a package 10 during the ensuing exothermic reaction causes package 10 and material contained within package 10 to be heated.
    Type: Application
    Filed: March 8, 2010
    Publication date: July 1, 2010
    Inventors: PAUL R. PIERSON, Robert V. Hare
  • Publication number: 20100028831
    Abstract: A dispensing syringe for dispensing a multi-component dental composition, preferably a two component composition, is provided. The syringe includes a syringe body with multiple elongated barrels for storing the components of the composition; a threaded plunger rod assembly; and a rotatable, threaded connector knob. Preferably, the syringe body has a double-barrel structure and the plunger rod assembly includes two plunger rods that slide within the barrels. The threaded knob has a through-bore with a continuous internal thread for engaging the outer threads of the first and second plunger rods. A dental practitioner manually rotates the knob to displace the first and second plunger rods and discharge the components. The dispensing syringe may further include a dispensing tip containing a static mixing element for mixing the components and dispensing the mixed composition.
    Type: Application
    Filed: October 7, 2009
    Publication date: February 4, 2010
    Inventor: Paul R. Pierson
  • Publication number: 20090020440
    Abstract: The invention provides a container enclosing an applicator and a dental composition including a volatile organic solvent. The container is sealed. The volatile organic solvent is effectively retained within the container, even after storage at about 43° C. for one week. Preferably the container is made of a copolymer of a cycloolefin and an open chain olefin.
    Type: Application
    Filed: September 18, 2008
    Publication date: January 22, 2009
    Inventors: Paul R. Pierson, Paul D. Hammesfahr
  • Publication number: 20080138765
    Abstract: A tip (10) for the dispensing of materials includes a housing (11) having first and second chambers (12, 13) contained therein. The chambers (12, 13) communicate with a mixing reservoir (19) and a hollow barrel (21). The hollow barrel (21) has an output orifice (51) and is in fluid communication with the mixing reservoir (19). Disposed within hollow barrel (21) is a static mixing device (30).
    Type: Application
    Filed: August 13, 2007
    Publication date: June 12, 2008
    Inventor: Paul R. Pierson
  • Publication number: 20080113314
    Abstract: A heat pack 30 is provided which contains the reactants for an exothermic chemical reaction. The heat pack 30 having physical contact with or close physical proximity to a package 10 during the ensuing exothermic reaction causes package 10 and material contained within package 10 to be heated.
    Type: Application
    Filed: March 3, 2006
    Publication date: May 15, 2008
    Inventors: Paul R. Pierson, Robert V. Hare
  • Patent number: 6612465
    Abstract: A multi-component, mixing, storage and dispensing package (10) has a housing 11, a displaceable cavity block (20) having at least one cavity (21) therein. A vent spike block (40) having at least one spike (42) held in an opposing relation to at least one cavity (21) is provided within the housing (11). When cavity block (21) is caused to move toward the vent spike block (40) spike (42) is caused to enter a cavity (21). A vent (43) is in fluid communication through the spike (42) with a mix channel (51) and a mixing and dispensing tip (50).
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: September 2, 2003
    Assignee: Dentsply Research & Development Corp.
    Inventors: Paul R. Pierson, Paul D. Hammesfahr
  • Patent number: 6571992
    Abstract: A dispensing syringe (10) has a barrel (20) keyed (31, 32) to a gripping assembly (40) having complementary keyed surfaces (42). A nut having dual threads (61, 62) of differing diameters is threaded to one end of the barrel (20) and receives a matingly threaded (71) plunger (70). Turning the plunger (70) causes it to advance within the barrel (20) due to the interaction of the mating threads (61, 71). The gripping assembly (40) is provided with winged projections (50) that facilitate handling and manipulation of the syringe (10). The complementary keyed surfaces (31, 32 and 42) physically interact so as to prevent the gripping assembly (40) from turning or twisting about the barrel (20) during use.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: June 3, 2003
    Assignee: Dentsply Research & Development Corp.
    Inventors: Paul R. Pierson, Curt E. Metzbower
  • Patent number: D814041
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: March 27, 2018
    Assignee: DENTSPLY SIRONA Inc
    Inventors: Jeremy Kile, Paul R. Pierson
  • Patent number: D818593
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: May 22, 2018
    Assignee: DENTSPLY SIRONA Inc.
    Inventors: Jeremy Kile, Paul R. Pierson
  • Patent number: D821585
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: June 26, 2018
    Assignee: DENTSPLY SIRONA Inc.
    Inventors: Jeremy Kile, Paul R. Pierson
  • Patent number: D821586
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: June 26, 2018
    Assignee: DENTSPLY SIRONA Inc.
    Inventors: Jeremy Kile, Paul R. Pierson