Patents by Inventor Harry W. Smith

Harry W. Smith 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).

  • Grout finishing method with kit
    Patent number: 5543178
    Abstract: A method for accomplishing the above and other objectives has steps of applying a mild solution of acid to surfaces of grout and tile, letting the surfaces dry for approximately 12 hours, applying a grout colorant and sealing material, referred to as grout-treating material, to the grout and such surfaces of tile as the grout-treating material contacts in an application process, allowing grout-treating material on grout and tile surfaces to dry, cleaning the grout and tile surfaces with a non-solvent cleaner and then merely scraping and vacuuming or sweeping the grout-treating material from the surfaces. A small portion of the grout-treating material which might stick to surfaces of some types of tile in the event of errors in applying this method can be scraped off easily or removed with a scrub pad. The preferred acid is 3-to-15 percent oxalic acid in a solution with water. Similar proportions of muriatic acid or sulfanilic acid can be used as substitutes for oxalic acid.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: August 6, 1996
    Inventor: Harry W. Smith
  • Patient elevating wheel chair
    Patent number: D352684
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: November 22, 1994
    Inventors: Harry W. Smith, E. Thelma Smith