Patents by Inventor Christopher A. Wallis

Christopher A. Wallis 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: 11523864
    Abstract: An electrosurgical controller and related methods. At least some of the illustrative embodiments are methods including: placing a distal end of an electrosurgical wand in operational relationship with biological tissue; delivering energy to an active electrode of the electrosurgical wand. During delivering energy, the method may comprise: measuring a value indicative of flow of the energy to the active electrode; summing, over a first predetermined window of time, to create a first value indicative of energy provided to the active electrode; summing, over a second predetermined window of time, to create a second value indicative of energy provided to the active electrode. The method may further comprise: ceasing delivering energy responsive to the first value meeting or exceeding a predetermined value; and ceasing delivering energy responsive to the second value meeting or exceeding a threshold value.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: December 13, 2022
    Assignee: ArthroCare Corporation
    Inventors: Jean Woloszko, Scott A. Armstrong, Michael Bozeman, Christopher A. Wallis
  • Patent number: 11155702
    Abstract: A degradable polymer composition comprising: (a) a polyolefin; (b) two or more transition metal compounds in a total amount of from 0.15 to 0.6 wt %, (c) a mono- or poly-unsaturated C14-C24 carboxylic acid, or an ester, anhydride or amide thereof, in an amount of from 0.04 to 0.08 wt %; (d) a synthetic rubber in an amount of from 0.04 to 0.2 wt %; and, optionally: (e) dry starch in an amount of from 0 to 20 wt %; and/or (f) calcium oxide in an amount of from 0 to 1 wt %; and/or (g) a phenolic antioxidant stabilizer in an amount of from 0 to 0.2 wt %; wherein the two or more transition metal compounds are selected from iron, manganese, copper, cobalt and cerium compounds and wherein the transition metals in the two or more transition metal compounds are different.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 26, 2021
    Assignee: Polymateria Limited
    Inventors: Graham Chapman, Christopher Wallis, Gavin Hill
  • Patent number: 10570263
    Abstract: A sheet material formed of a degradeable composition comprising 30 to 80 wt % calcium carbonate, an additive, and the balance a polymer selected from polyethylene, polypropylene and copolymers and blends thereof. The additive comprises (a) two or more transition metal compounds, (b) a mono- or poly-unsaturated C14-C24 carboxylic acid, or an ester, anhydride or amide thereof, (c) a synthetic rubber. The addition optionally comprises (d) dry starch, and/or (e) calcium oxide, and/or (f) a phenolic antioxidant stabilizer. The two or more transition metal compounds are selected from iron, manganese, copper, zinc, titanium, cobalt and cerium compounds and the transition metals in the two or more transition metal compounds are different.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: February 25, 2020
    Assignee: Polymateria Limited
    Inventors: Christopher Wallis, Graham Chapman, Gavin Hill
  • Publication number: 20190374284
    Abstract: An electrosurgical controller and related methods. At least some of the illustrative embodiments are methods including: placing a distal end of an electrosurgical wand in operational relationship with biological tissue; delivering energy to an active electrode of the electrosurgical wand. During delivering energy, the method may comprise: measuring a value indicative of flow of the energy to the active electrode; summing, over a first predetermined window of time, to create a first value indicative of energy provided to the active electrode; summing, over a second predetermined window of time, to create a second value indicative of energy provided to the active electrode. The method may further comprise: ceasing delivering energy responsive to the first value meeting or exceeding a predetermined value; and ceasing delivering energy responsive to the second value meeting or exceeding a threshold value.
    Type: Application
    Filed: August 20, 2019
    Publication date: December 12, 2019
    Applicant: ArthroCare Corporation
    Inventors: Jean Woloszko, Scott A. Armstrong, Michael Bozeman, Christopher A. Wallis
  • Publication number: 20190352476
    Abstract: A sheet material formed of a degradeable composition comprising 30 to 80 wt % calcium carbonate, an additive, and the balance a polymer selected from polyethylene, polypropylene and copolymers and blends thereof. The additive comprises (a) two or more transition metal compounds, (b) a mono- or poly-unsaturated C14-C24 carboxylic acid, or an ester, anhydride or amide thereof, (c) a synthetic rubber. The addition optionally comprises (d) dry starch, and/or (e) calcium oxide, and/or (f) a phenolic antioxidant stabilizer. The two or more transition metal compounds are selected from iron, manganese, copper, zinc, titanium, cobalt and cerium compounds and the transition metals in the two or more transition metal compounds are different.
    Type: Application
    Filed: January 8, 2018
    Publication date: November 21, 2019
    Applicant: POLYMATERIA LIMITED
    Inventors: Christopher Wallis, Graham Chapman, Gavin Hill
  • Publication number: 20190309147
    Abstract: A degradable polymer composition comprising: (a) a polyolefin; (b) two or more transition metal compounds in a total amount of from 0.15 to 0.6 wt %, (c) a mono- or poly-unsaturated C14-C24 carboxylic acid, or an ester, anhydride or amide thereof, in an amount of from 0.04 to 0.08 wt %; (d) a synthetic rubber in an amount of from 0.04 to 0.2 wt %; and, optionally: (e) dry starch in an amount of from 0 to 20 wt %; and/or (f) calcium oxide in an amount of from 0 to 1 wt %; and/or (g) a phenolic antioxidant stabilizer in an amount of from 0 to 0.2 wt %; wherein the two or more transition metal compounds are selected from iron, manganese, copper, cobalt and cerium compounds and wherein the transition metals in the two or more transition metal compounds are different.
    Type: Application
    Filed: November 21, 2017
    Publication date: October 10, 2019
    Applicant: POLYMATERIA LIMITED
    Inventors: Graham Chapman, Christopher Wallis, Gavin Hill
  • Patent number: 10420607
    Abstract: An electrosurgical controller and related methods. At least some of the illustrative embodiments are methods including: placing a distal end of an electrosurgical wand in operational relationship with biological tissue; delivering energy to an active electrode of the electrosurgical wand. During delivering energy, the method may comprise: measuring a value indicative of flow of the energy to the active electrode; summing, over a first predetermined window of time, to create a first value indicative of energy provided to the active electrode; summing, over a second predetermined window of time, to create a second value indicative of energy provided to the active electrode. The method may further comprise: ceasing delivering energy responsive to the first value meeting or exceeding a predetermined value; and ceasing delivering energy responsive to the second value meeting or exceeding a threshold value.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: September 24, 2019
    Assignee: ArthroCare Corporation
    Inventors: Jean Woloszko, Scott A. Armstrong, Michael Bozeman, Christopher A. Wallis
  • Publication number: 20150230861
    Abstract: An electrosurgical controller and related methods. At least some of the illustrative embodiments are methods including: placing a distal end of an electrosurgical wand in operational relationship with biological tissue; delivering energy to an active electrode of the electrosurgical wand. During delivering energy, the method may comprise: measuring a value indicative of flow of the energy to the active electrode; summing, over a first predetermined window of time, to create a first value indicative of energy provided to the active electrode; summing, over a second predetermined window of time, to create a second value indicative of energy provided to the active electrode. The method may further comprise: ceasing delivering energy responsive to the first value meeting or exceeding a predetermined value; and ceasing delivering energy responsive to the second value meeting or exceeding a threshold value.
    Type: Application
    Filed: February 14, 2014
    Publication date: August 20, 2015
    Applicant: ArthroCare Corporation
    Inventors: Jean Woloszko, Scott A. Armstrong, Michael Bozeman, Christopher A. Wallis