Patents by Inventor David Prichard

David Prichard 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 for determining glycol and formaldehyde contaminants in ground water samples
    Patent number: 5801300
    Abstract: A method for the qualitative determination of the visible levels of glycol and/or formaldehyde at significant concentrations greater than 10 ppm (10 ppm-10,000 ppm range) in a water sample, in which the sample is treated first with periodic acid, then with iodide-thiosulfate and finally with acetyl acetone to yield a yellow color without the benefit of heat. This yellow color is visible to the naked eye and proportional to the amount of contaminants ethylene glycol, propylene glycol and/or formaldehyde present in the original water sample.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: September 1, 1998
    Assignee: Life Science Laboratories, Inc.
    Inventors: Joseph L. Jeraci, David Prichard
  • Carrier lift for plumbing
    Patent number: D776392
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: January 10, 2017
    Inventor: David Prichard
  • Stackable rack for fabrication material transportation
    Patent number: D810381
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: February 13, 2018
    Inventor: David Prichard