Patents by Inventor John Anthony Marsh

John Anthony Marsh 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).

  • Kreeger sluice
    Patent number: 9586211
    Abstract: A sluice box is described comprising two walls, and a plurality of riffles. Riffles can have a first portion that extends below the bottom panel of a sluice box (or the bottom of a flow), and a second portion that extends above the bottom panel of a sluice box (or the bottom of a flow). By creating a catch in a riffle by having a portion of the riffle extend below a bottom panel of a sluice box, heavier minerals are not washed away as quickly, if at all, as with other sluices.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: March 7, 2017
    Inventor: John Anthony Marsh
  • Kreeger Sluice
    Publication number: 20150182972
    Abstract: A sluice box is described comprising two walls, and a plurality of riffles. Riffles can have a first portion that extends below the bottom panel of a sluice box (or the bottom of a flow), and a second portion that extends above the bottom panel of a sluice box (or the bottom of a flow). By creating a catch in a riffle by having a portion of the riffle extend below a bottom panel of a sluice box, heavier minerals are not washed away as quickly, if at all, as with other sluices.
    Type: Application
    Filed: December 23, 2014
    Publication date: July 2, 2015
    Inventor: John Anthony Marsh