Patents by Inventor Patrick J. Gronlund

Patrick J. Gronlund 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).

  • Method of generating sparged, electrochemically activated liquid
    Publication number: 20070187261
    Abstract: A method is provided, which includes generating a cleaning liquid by a combination of a sparging process and an electrochemical process that produces an anolyte and a catholye.
    Type: Application
    Filed: January 19, 2007
    Publication date: August 16, 2007
    Applicant: Tennant Company
    Inventors: Bruce F. Field, Patrick J. Gronlund
  • Method and apparatus for producing humanly-perceptable indicator of electrochemical properties of an output cleaning liquid
    Publication number: 20070186957
    Abstract: A surface cleaning apparatus is provided. The apparatus includes a mobile body configured to travel over a surface, a cleaning device carried by the mobile body, a liquid flow path, and an electrolyzing device in the liquid flow path. An indicator provides a humanly-perceptible indication of an electrical operating characteristic of the electrolyzing device.
    Type: Application
    Filed: January 19, 2007
    Publication date: August 16, 2007
    Applicant: Tennant Company
    Inventors: Bruce F. Field, Patrick J. Gronlund
  • Apparatus for generating sparged, electrochemically activated liquid
    Publication number: 20070186369
    Abstract: An apparatus is provided, which includes a sparging device and a functional generator. The functional generator is in fluid communication with the sparging device and includes an anode chamber and a cathode chamber separated by an ion exchange membrane.
    Type: Application
    Filed: January 19, 2007
    Publication date: August 16, 2007
    Applicant: Tennant Company
    Inventors: Bruce F. Field, Patrick J. Gronlund
  • Reduced visibility insect screen
    Patent number: 6763875
    Abstract: An insect screen that includes a rigid frame defining a frame perimeter and a metal screen located within the rigid frame perimeter. The metal screen has a plurality of metal elements with a dark mat surface. The metal elements have a width of about 0.001 inch to about 0.0015 inch. The insect screen has a reduced visibility such that it appears nearly invisible or transparent.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: July 20, 2004
    Assignee: Andersen Corporation
    Inventors: Patrick J. Gronlund, Rodney K. Williams, Russell J. Pylkki
  • Reduced visibility insect screen
    Publication number: 20030145960
    Abstract: An insect screen that includes a rigid frame defining a frame perimeter and a metal screen located within the rigid frame perimeter. The metal screen has a plurality of metal elements with a dark mat surface. The metal elements have a width of about 0.001 inch to about 0.0015 inch. The insect screen has a reduced visibility such that it appears nearly invisible or transparent.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 7, 2003
    Inventors: Patrick J. Gronlund, Rodney K. Williams, Russell J. Pylkki