Patents by Inventor Ronald E. Sherwood

Ronald E. Sherwood 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: 6189170
    Abstract: An area-rug cleaning method has steps of air spray (1) for removing dry-extractible dirt with angularly directed air pressure; immersion shampoo (9) for removing immersion-extractible dirt with immersion-shampooing that does not molest rug fibers; scrub wash (16) for removing adhered dirt such as stains, odors and urine with rotational scrub washing; vacuum extract (18) for removing wash fluid with dry vacuum extraction; water rinse (20); cool dry (23); dry clean (24) for removing wash-resistant dirt; acid condition (25) for neutralizing base cleaning agents with an acid-based catalyst; and pad rub (26) for rubbing nap of the area rugs with a cloth pad to provide a shine finish.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: February 20, 2001
    Inventor: Ronald E. Sherwood