Patents by Inventor Roy D. Williams

Roy D. Williams 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).

  • Organic reagent for the colorimetric detection of chlorine and ozone in drinking water
    Patent number: 5155048
    Abstract: Para-substituted phenylene ring compounds where the substituent moieties are selected from the group consisting of aminoalkyl rings and alkyl rings, such as 1,1'-para-phenylene dipiperidine and 1,1'-para-phenylene dipyrolidine, can be used as colorimetric reagents for detecting the presence of small quantities of chlorine or ozone in water.
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: October 13, 1992
    Assignee: Center for Innovative Technology
    Inventors: Roy D. Williams, Sherry L. Williams
  • Turkey hunter's safety placard
    Patent number: D297249
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: August 16, 1988
    Inventor: Roy D. Williams