Patents by Inventor Keith F. Wojciechowski

Keith F. Wojciechowski 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: 11413656
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: January 4, 2021
    Date of Patent: August 16, 2022
    Assignee: DERRICK CORPORATION
    Inventor: Keith F. Wojciechowski
  • Patent number: 11198155
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: December 14, 2021
    Assignee: DERRICK CORPORATION
    Inventor: Keith F. Wojciechowski
  • Publication number: 20210121919
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: January 4, 2021
    Publication date: April 29, 2021
    Inventor: Keith F. Wojciechowski
  • Patent number: 10967401
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: April 6, 2021
    Assignee: DERRICK CORPORATION
    Inventor: Keith F. Wojciechowski
  • Patent number: 10933444
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: March 2, 2021
    Assignee: DERRICK CORPORATION
    Inventor: Keith F. Wojciechowski
  • Publication number: 20190314861
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: March 20, 2019
    Publication date: October 17, 2019
    Inventor: Keith F. Wojciechowski
  • Publication number: 20190217338
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: March 20, 2019
    Publication date: July 18, 2019
    Inventor: Keith F. Wojciechowski
  • Patent number: 10259013
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 16, 2019
    Assignee: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Publication number: 20190001373
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 3, 2019
    Inventor: Keith F. Wojciechowski
  • Patent number: 10046363
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: August 14, 2018
    Assignee: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Publication number: 20180185880
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: December 21, 2017
    Publication date: July 5, 2018
    Inventor: Keith F. Wojciechowski
  • Patent number: 9884344
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: February 6, 2018
    Assignee: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Publication number: 20170312785
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: July 5, 2016
    Publication date: November 2, 2017
    Applicant: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Publication number: 20160310994
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: July 5, 2016
    Publication date: October 27, 2016
    Applicant: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Patent number: 9409209
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: August 9, 2016
    Assignee: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Publication number: 20140262978
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: May 2, 2014
    Publication date: September 18, 2014
    Applicant: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Publication number: 20130313168
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: March 13, 2013
    Publication date: November 28, 2013
    Applicant: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Patent number: 8439203
    Abstract: A vibratory screening machine includes a primary screening area and a pre-screening assembly including a frame and screen assemblies. The screen assemblies are secured to the frame and form a pre-screening surface. The frame is attached to the vibratory screening machine such that the concave pre-screening surface is above the primary screening area.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: May 14, 2013
    Assignee: Derrick Corporation
    Inventors: Keith F. Wojciechowski, Christian Newman
  • Publication number: 20080314804
    Abstract: A vibratory screening machine includes a primary screening area and a pre-screening assembly including a frame and screen assemblies. The screen assemblies are secured to the frame and form a pre-screening surface. The frame is attached to the vibratory screening machine such that the concave pre-screening surface is above the primary screening area.
    Type: Application
    Filed: March 19, 2008
    Publication date: December 25, 2008
    Applicant: DERRICK CORPORATION
    Inventors: Keith F. Wojciechowski, Christian Newman
  • Patent number: 7228971
    Abstract: A vibratory screening machine having opposite sides with a plurality of stationary aligned tensioning members mounted on one side and a plurality of nut actuated movable tensioning members mounted on the opposite side and a vibratory screening screen mounted on the stationary and movable tensioning members. The tensioning members have upstanding fingers which are received in apertures in the plates of the vibratory screen, and the edge portions of the vibratory screen include screening material which extends all of the way to the extreme edges of the supporting plate and the fingers are below the screening material. Also, the tensioning structure is mounted on the side walls of the vibratory screening machine below the vibratory screen.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: June 12, 2007
    Assignee: Derrick Corporation
    Inventors: James A. Mooney, Keith F. Wojciechowski