Patents by Inventor Kristine Mila H. Cruz

Kristine Mila H. Cruz 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).

  • Portable microbiological testing device for gases
    Patent number: 8143019
    Abstract: A method and apparatus for microbiological testing of biogas and other gaseous streams in which a liquid bacteria growth medium disposed within a lower region of a portable sampling vessel is contacted with a gas sample of interest. The gas sample is passed through a hydrophobic filter element which retains microorganisms in the gas sample. The sampling vessel is then inverted, thereby submerging the hydrophobic filter element in the liquid bacteria growth medium. The sampling vessel is incubated for a predetermined period of time at a predetermined temperature following which a presence or absence of microorganisms is determined based on turbidity and/or color of the liquid bacteria growth medium.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: March 27, 2012
    Assignee: Gas Technology Institute
    Inventors: Xiangyang Zhu, Kristine Mila H. Cruz, Diane Saber
  • PORTABLE MICROBIOLOGICAL TESTING DEVICE FOR GASES
    Publication number: 20100330603
    Abstract: A method and apparatus for microbiological testing of biogas and other gaseous streams in which a liquid bacteria growth medium disposed within a lower region of a portable sampling vessel is contacted with a gas sample of interest. The gas sample is passed through a hydrophobic filter element which retains microorganisms in the gas sample. The sampling vessel is then inverted, thereby submerging the hydrophobic filter element in the liquid bacteria growth medium. The sampling vessel is incubated for a predetermined period of time at a predetermined temperature following which a presence or absence of microorganisms is determined based on turbidity and/or color of the liquid bacteria growth medium.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Applicant: GAS TECHNOLOGY INSTITUTE
    Inventors: Xiangyang Zhu, Kristine Mila H. Cruz, Diane Saber