Patents by Inventor David M. Ludwig

David M. Ludwig 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: 6797124
    Abstract: A solar distilling apparatus employs anthracite coal as a heat-absorbing medium. Greenhouse roof elements rest over a gutter that is isolated from the water-holding container to prevent deposit formation and algae growth from reaching the gutter. Bacterial growth is inhibited by ventilation and the use of titanium-laden magnetite mixed with the anthracite particles. The gutter is also isolated from the exterior of the unit, which prevents contamination from outside sources. The exterior side of the roof elements resting on the gutter are fitted with a metal skirt that provides a heat sink preventing the re-evaporation of condensation flowing toward the gutter.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: September 28, 2004
    Inventor: David M. Ludwig
  • Publication number: 20030057084
    Abstract: A solar distilling apparatus employs anthracite coal as a heat-absorbing medium. Greenhouse roof elements rest over a gutter that is isolated from the water-holding container to prevent deposit formation and algae growth from reaching the gutter. Bacterial growth is inhibited by ventilation and the use of titanium-laden magnetite mixed with the anthracite particles. The gutter is also isolated from the exterior of the unit, which prevents contamination from outside sources. The exterior side of the roof elements resting on the gutter are fitted with a metal skirt that provides a heat sink preventing the re-evaporation of condensation flowing toward the gutter.
    Type: Application
    Filed: October 30, 2002
    Publication date: March 27, 2003
    Inventor: David M. Ludwig
  • Publication number: 20020060147
    Abstract: A method and apparatus for distilling water using solar energy. A distilling apparatus employs anthracite coal as the heat absorbing medium. The materials used in the apparatus are restricted substantially to glass, coal, silicone and a noble metal such as stainless steel to increase longevity and water quality. To produce and maintain optimum health, water treated according to the invention should make up the bulk of a person's daily water intake, exclusive of the water that is contained in foods and beverages, and the water should be ingested within 7 days of the time it was evaporated.
    Type: Application
    Filed: December 12, 2001
    Publication date: May 23, 2002
    Inventor: David M. Ludwig