Patents by Inventor David R. Leadingham

David R. Leadingham 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: 5525255
    Abstract: A safe and effective, neutral, non-toxic cleaning agent composition containing a surfactant, nonylphenol ethoxylate, and a wetting agent alkane sulfonate, for rapidly and economically removing oils and greases. The composition is safe in handling, and enables more rapid oil and grease removal than prior art cleaners. The composition is aqueous based, and therefore more environmentally safe and able to be used in conjunction with biodegradation systems without detrimentally effecting microorganisms performing the breakdown of waste.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: June 11, 1996
    Inventors: David R. Leadingham, Charles J. Latta