Patents by Inventor Curtis F. Johnston

Curtis F. Johnston 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: 8245468
    Abstract: A flexible, extruded plastic wall structure with a hollow core is presented along with a method of making the same. The wall structure has an overall flat back wall, an overall front wall and at least one support wall extending between and confined to the interior surfaces of the overall back wall and the overall front wall; the overall back wall, the overall front wall and the at least one support wall having a generally uniform thickness and defining at least two defined spaces. The wall structure includes sections, where the rear wall of each section is flat from the bottom of the wall structure to the top of the wall structure. The hollow wall structure has a front wall having vertically disposed sections with different contours. The method includes using extrusion die for heating and extruding plastics using a multi-functional insert within the die and air pressure to create a hollow core in the wall structure.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: August 21, 2012
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Patent number: 7556758
    Abstract: A method for manufacturing a flexible, extruded plastic wall base with a hollow core is presented. The method includes using extrusion die for heating and extruding plastics using a multi-functional insert within the die and air pressure to create a hollow core in the wall base. The hollow core allows less material to flow though the die so that the die stays hotter and the flow of the extruded plastic is not impeded. The resulting extruded plastic wall base is comprised of a generally thick portion, a generally thin portion and a profile on the face or front of the wall base.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: July 7, 2009
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Publication number: 20080236072
    Abstract: A flexible, extruded plastic wall structure with a hollow core is presented along with a method of making the same. The wall structure has an overall flat back wall, an overall front wall and at least one support wall extending between and confined to the interior surfaces of the overall back wall and the overall front wall; the overall back wall, the overall front wall and the at least one support wall having a generally uniform thickness and defining at least two defined spaces. The wall structure includes sections, where the rear wall of each section is flat from the bottom of the wall structure to the top of the wall structure. The hollow wall structure has a front wall having vertically disposed sections with different contours. The method includes using extrusion die for heating and extruding plastics using a multi-functional insert within the die and air pressure to create a hollow core in the wall structure.
    Type: Application
    Filed: April 15, 2008
    Publication date: October 2, 2008
    Applicant: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Publication number: 20080211144
    Abstract: A method for manufacturing a flexible, extruded plastic wall base with a hollow core is presented. The method includes using extrusion die for heating and extruding plastics using a multi-functional insert within the die and air pressure to create a hollow core in the wall base. The hollow core allows less material to flow though the die so that the die stays hotter and the flow of the extruded plastic is not impeded. The resulting extruded plastic wall base is comprised of a generally thick portion, a generally thin portion and a profile on the face or front of the wall base.
    Type: Application
    Filed: February 14, 2008
    Publication date: September 4, 2008
    Applicant: Johnsonite, Inc.
    Inventor: Curtis F. Johnston
  • Patent number: D676153
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 12, 2013
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Patent number: D676154
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 12, 2013
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Patent number: D676155
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 12, 2013
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Patent number: D676156
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 12, 2013
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Patent number: D676157
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 12, 2013
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston
  • Patent number: D676158
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 12, 2013
    Assignee: Johnsonite Inc.
    Inventor: Curtis F. Johnston