Patents by Inventor Nancy L. Casselman

Nancy L. Casselman 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
  • Method and composition for inhibiting growth of microorganisms including peracetic acid and a non-oxidizing biocide
    Patent number: 5980758
    Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of microorganisms. The composition of the present invention includes sufficient amounts of peracetic and a non-oxidizing biocide. The method of the present invention includes the step of adding sufficient amounts of peracetic acid and the non-oxidizing biocide to industrial process waters.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: November 9, 1999
    Assignee: Nalco Chemical Company
    Inventors: Judy G. LaZonby, Robert E. McCarthy, Nancy L. Casselman
  • Method and composition for inhibiting growth of microorganisms including peracetic acid and a non-oxidizing biocide
    Patent number: 5785867
    Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of microorganisms. The composition of the present invention includes sufficient amounts of a peracetic acid or peracetic acid/peracid blend and a non-oxidizing biocide. The method of the present invention includes the step of adding sufficient amounts of the peracetic acid or peracetic acid/peracid blend and the non-oxidizing biocide to industrial process waters.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: July 28, 1998
    Assignee: Nalco Chemical Company
    Inventors: Judy G. LaZonby, Robert E. McCarthy, Nancy L. Casselman
  • Method and composition for inhibiting growth of microorganisms including peracetic acid and a non-oxidizing biocide
    Patent number: 5658467
    Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of microorganisms. The composition of the present invention includes sufficient amounts of a peracetic acid and a non-oxidizing biocide. The method of the present invention includes the step of adding sufficient amounts of the peracetic acid and the non-oxidizing biocide to industrial process waters.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: August 19, 1997
    Assignee: Nalco Chemical Company
    Inventors: Judy G. LaZonby, Robert E. McCarthy, Nancy L. Casselman
  • Synergy biocides for use in aqueous ore slurries
    Patent number: 5637587
    Abstract: This invention provides a surprisingly efficacious combination useful for inhibiting microorganism growth, particularly in aqueous slurries containing mineral ore. In particular embodiments, the invention provides an antimicrobial composition comprising 1-(3-chloroallyl)-3,5,7 triaza-1-azoniaadamantane chloride and 2-bromo-2-nitropropane-1,3-diol. The invention also provides a method for inhibiting microbial growth in an aqueus mineral or ore slurry, e.g. a kaolin slurry. The method includes the step of adding to the slurry a microbiocidal composition of 1-(3-chloroallyl)-3,5,7 triaza-1-azoniaadamantane chloride and 2-bromo-2-nitropropane-1,3-diol.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: June 10, 1997
    Assignee: Nalco Chemical Company
    Inventors: Anthony E. Gross, Nancy L. Casselman