Patents by Inventor David C. Plath

David C. Plath 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).

  • Low-cost magnetically aided apparatus for separating dental amalgam from waste water
    Patent number: 7811088
    Abstract: A replaceable module for capturing amalgam and mercury from the waste water disposal system of a dental office, in which the waste water flows into a settling chamber, overflows from the settling chamber into a magnetically-assisted sluice, and then after being further cleaned by the sluice, flows on to a sewer connection.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: October 12, 2010
    Inventor: David C. Plath
  • Low-cost magnetically aided apparatus for separating dental amalgam from waste water
    Publication number: 20080099390
    Abstract: A replaceable module for capturing amalgam and mercury from the waste water disposal system of a dental office, in which the waste water flows into a settling chamber, overflows from the settling chamber into a magnetically-assisted sluice, and then after being further cleaned by the sluice, flows on to a sewer connection.
    Type: Application
    Filed: October 25, 2006
    Publication date: May 1, 2008
    Inventor: David C. Plath
  • Method and apparatus for recovering fine gold from low grade ores
    Patent number: 5927508
    Abstract: Recovery of gold fines from gold-bearing ores is achieved by flowing an aqueous slurry of particulate gold-bearing ore over a sluice supporting a mat of magnetically susceptible particulate material, which preferably includes the magnetite content of the ore or a quantity of magnetite added to the ore, the mat being disposed over a sheet of magnetic material in which magnetic poles extending across the sluice and alternate in polarity at spaced intervals along the length of the sluice.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: July 27, 1999
    Inventor: David C. Plath