Patents by Inventor Sasireka S. Ramesh

Sasireka S. Ramesh 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).

  • Measurement of microbiological activity in an opaque medium
    Patent number: 6440689
    Abstract: A method for monitoring the microbiological contamination of opaque media is described and claimed. In this method, a Fluorogenic Dye is added to an Aliquot of opaque medium. After a certain time period, a fluorometer capable of measuring fluorescent signals in an opaque medium is used to measure the fluorogenic signals of the Fluorogenic Dye and the Reacted Fluorogenic Dye. A Useful RATIO of the fluorescent signal of the Reacted Fluorogenic Dye to the fluorescent signal of the Fluorogenic Dye is calculated and the information gleaned from the RATIO is used to ascertain the state of microbiological contamination in the opaque medium.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: August 27, 2002
    Assignee: Ondeo Nalco Company
    Inventors: Rodney H. Banks, Nancy L. Casselman, Mita Chattoraj, Ronald V. Davis, Michael J. Fehr, Sasireka S. Ramesh, David P. Workman
  • Measurement of microbiological activity in an opaque medium
    Publication number: 20020042092
    Abstract: A method for monitoring the microbiological contamination of opaque media is described and claimed. In this method, a Fluorogenic Dye is added to an Aliquot of opaque medium. After a certain time period, a fluorometer capable of measuring fluorescent signals in an opaque medium is used to measure the fluorogenic signals of the Fluorogenic Dye and the Reacted Fluorogenic Dye. A Useful RATIO of the fluorescent signal of the Reacted Fluorogenic Dye to the fluorescent signal of the Fluorogenic Dye is calculated and the information gleaned from the RATIO is used to ascertain the state of microbiological contamination in the opaque medium.
    Type: Application
    Filed: June 28, 2001
    Publication date: April 11, 2002
    Inventors: Rodney H. Banks, Nancy L. Casselman, Mita Chattoraj, Ronald V. Davis, Michael J. Fehr, Sasireka S. Ramesh, David P. Workman
  • Synergistic blend of 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane tetrahydro-3,5,-dimethyl-2h-1,3,5-thiadiazine-2-thione
    Patent number: 5716629
    Abstract: The invention is a composition for controlling microbiological growth which comprises a combination of 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane and tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione. The invention has particular utility as a composition for controlling microbiological growth in a slurry of paper machine additives such as precipitated calcium carbonate which comprises adding to said slurry a combination of 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane and tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione.The invention is also a method for controlling bacterial and fungal growth which comprises a combination of 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane and tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: February 10, 1998
    Assignee: Nalco Chemical Company
    Inventors: Linda R. Robertson, Sasireka S. Ramesh