Patents by Inventor Derrick Corporation

Derrick Corporation 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 and Apparatuses for Pre-Screening
    Publication number: 20130220892
    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: April 10, 2013
    Publication date: August 29, 2013
    Applicant: Derrick Corporation
    Inventor: Derrick Corporation
  • METHOD AND APPARATUSES FOR SCREENING
    Publication number: 20130175205
    Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
    Type: Application
    Filed: February 7, 2013
    Publication date: July 11, 2013
    Applicant: Derrick Corporation
    Inventor: Derrick Corporation
  • METHOD AND APPARATUSES FOR SCREENING
    Publication number: 20130098810
    Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 25, 2013
    Applicant: Derrick Corporation
    Inventor: Derrick Corporation
  • METHOD AND APPARATUSES FOR SCREENING
    Publication number: 20130037457
    Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
    Type: Application
    Filed: October 17, 2012
    Publication date: February 14, 2013
    Applicant: Derrick Corporation
    Inventor: Derrick Corporation
  • METHOD AND APPARATUSES FOR SCREENING
    Publication number: 20130037458
    Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
    Type: Application
    Filed: October 17, 2012
    Publication date: February 14, 2013
    Applicant: DERRICK CORPORATION
    Inventor: DERRICK CORPORATION