Patents by Inventor Richard D. Michael

Richard D. Michael 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).

  • Expanding vehicle for colorimetric diagnostic assays
    Patent number: 5468450
    Abstract: The invention provides a vehicle for colorimetric assay which expands upon contact with biological fluids. This expansion allows easy visualization of color changes associated with colorimetric assays, particularly when the vehicle is distributed as particles within animal litters.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: November 21, 1995
    Inventor: Richard D. Michael
  • Expanding base deep foundation system
    Patent number: 5100262
    Abstract: An expanding deep base foundation system including a pre-manufactured base foot attached to the lower end of a metal shaft. The base being a length of pipe having cuts made along the length thereof. Cams are mounted on the inside of the pipe that expand the wall of the pipe foot outwardly as the metal shaft is forced through the expanding base thereby creating an enlarged base or foot.
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: March 31, 1992
    Inventors: Richard D. Michael, Hiroshi Sato
  • Animal litter deodorizing additive
    Patent number: 5005520
    Abstract: A litter material additive that by oxidation, effectively suppresses the majority of small animal odors originating from animal excreta, by using sodium perborate as the preferred oxidizing additive, and additionally using a desiccant for moisture control and a buffer for pH control.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: April 9, 1991
    Inventor: Richard D. Michael
  • Self-cleaning cat pan device
    Patent number: 4862830
    Abstract: A modified cat litter pan utilizing a pair of adjustable brackets that support the device on the rim of a commode bowl at a sufficiently acute angle to allow the device's contents to be discharged through a front hinged gate when forced out by a sliding brush contained within. After discharge the discarded material can be then flushed down the existing drain.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: September 5, 1989
    Inventor: Richard D. Michael