Patents by Inventor Clifford C. Rankin

Clifford C. Rankin 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).

  • Method for detection for total coliforms and
    Patent number: 7148033
    Abstract: An improved method for detection of total coliforms and E. coli comprising a broth containing an ingredient that will suppress growth of non-coliform gram negative bacteria, and at least one chromogen or fluorogen has been used effectively and is cost effective. Preferred methods include use of filter and/or plates containing the growth-promoting ingredients and the indicators.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: December 12, 2006
    Assignee: The United States of America as represented by the Administrator of the U. S. Environmental Protection Agency
    Inventors: Kristen P. Brenner, Clifford C. Rankin, Yvette R. Roybal-McKenna, Alfred P. Dufour
  • Method for detection for total coliforms and E. coli
    Publication number: 20040132127
    Abstract: An improved method for detection of total coliforms and E. coli comprising a broth containing an ingredient that will suppress growth of non-coliform gram negative bacteria, and at least one chromogen or fluorogen has been used effectively and is cost effective. Preferred methods include use of filter and/or plates containing the growth-promoting ingredients and the indicators.
    Type: Application
    Filed: November 17, 2003
    Publication date: July 8, 2004
    Inventors: Kristen P. Brenner, Clifford C. Rankin, Yvette R. Roybal-McKenna, Alfred P. Dufour
  • Method for detection of total coliforms and E. coli
    Patent number: 6670145
    Abstract: An improved method for detection of total coliforms and E. coli comprising a broth containing an ingredient that will encourage growth and repair of injured coliforms, buffers to maintain a pH in the range of 6.5-8, at least one agent that suppresses growth of gram positive cocci and spore-forming organisms, at least one active agent that will suppress growth of non-coliform gram negative bacteria, and at least one chromogen or fluorogen has been used effectively and is cost effective. In the preferred embodiment, both a fluorogen and chromogen were used. Preferred methods include use of filter and/or plates containing the growth-promoting ingredients and the indicators.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: December 30, 2003
    Assignee: The United States of America as represented by the Administrator of the Environmental Protection Agency
    Inventors: Kristen P. Brenner, Clifford C. Rankin, Yvette R. Roybal-McKenna, Alfred P. Dufour
  • Membrane filter agar medium for detection of total coliforms and E. coli
    Publication number: 20020048780
    Abstract: An improved method for detection of total coliforms and E. coli comprising a broth containing an ingredient that will encourage growth and repair of injured coliforms, buffers to maintain a pH in the range of 6.5-8, at least one agent that suppresses growth of gram positive cocci and spore-forming organisms, at least one active agent that will suppress growth of non-coliform gram negative bacteria, and at least one chromogen or fluorogen has been used effectively and is cost effective. In the preferred embodiment, both a fluorogen and chromogen were used. Preferred methods include use of filter and/or plates containing the growth-promoting ingredients and the indicators.
    Type: Application
    Filed: August 9, 2001
    Publication date: April 25, 2002
    Inventors: Kristen P. Brenner, Clifford C. Rankin, Yvette R. Roybal-Mckenna, Alfred P. Dufour
  • Membrane filter agar medium for simultaneous detection of total coliforms and E. coli
    Patent number: 6306621
    Abstract: An improved method for detection of total coliforms and E. coli comprising a broth containing an ingredient that will encourage growth and repair of injured coliforms, buffers to maintain a pH in the range of 6.5-8, at least one agent that suppresses growth of gram positive cocci and spore-forming organisms, at least one active agent that will suppress growth of non-coliform gram negative bacteria, and at least one chromogen or fluorogen has been used effectively and is cost effective. In the preferred embodiment, both a fluorogen and chromogen were used. Preferred methods include use of filter and/or plates containing the growth-promoting ingredients and the indicators.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: October 23, 2001
    Assignee: The United States of America as represented by the Administrator of the U.S. Environmental Protection Agency
    Inventors: Kristen P. Brenner, Clifford C. Rankin, Yvette R. Roybal-McKenna, Alfred P. Dufour
  • Membrane filter agar medium containing two enzyme substrates used for the simultaneous detection of total coliforms and E. coli.
    Patent number: 6063590
    Abstract: An improved method for detection of total coliforms and E. coli comprising placing the target sample in a broth containing an ingredient that will encourage growth and repair of injured coliforms, at least one agent that suppresses growth of gram positive cocci and spore-forming organisms, at least one active agent that will suppress growth of non-coliform gram negative bacteria, and at least one chromogen or fluorogen has been used effectively and is cost effective. In the preferred embodiment, both a fluorogen and chromogen were used. Preferred methods include use of filter and/or plates containing the growth-promoting ingredients and the indicators.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: May 16, 2000
    Assignee: The United States of America as represented by the Administrator of the U.S. Environmental Protection Agency
    Inventors: Kristen P. Brenner, Clifford C. Rankin, Yvette R. Roybal, Alfred P. Dufour