Patents by Inventor Brian R. Engel

Brian R. Engel 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 of determining efficacy of a sterilization process
    Patent number: 8802392
    Abstract: The present invention provides method of detecting a predetermined biological activity. The method includes using an aqueous mixture comprising a first indicator reagent with a first absorption spectrum and a second indicator reagent. The second indicator reagent is converted by the predetermined biological activity to a second biological derivative with a second emission spectrum. The first absorbance spectrum includes detectable absorbance in at least a portion of wavelengths present in the second emission spectrum. The first indicator reagent is received and concentrated from an aqueous liquid by a substrate, facilitating the detection of the second biological derivative.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: August 12, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Sailaja Chandrapati, Heather M. Webb, Jeffrey C. Pederson, Kurt J. Halverson, Brian R. Engel
  • METHOD OF DETECTING A BIOLOGICAL ACTIVITY
    Publication number: 20130210067
    Abstract: The present invention provides method of detecting a predetermined biological activity. The method includes using an aqueous mixture comprising a first indicator reagent with a first absorption spectrum and a second indicator reagent. The second indicator reagent is converted by the predetermined biological activity to a second biological derivative with a second emission spectrum. The first absorbance spectrum includes detectable absorbance in at least a portion of wavelengths present in the second emission spectrum. The first indicator reagent is received and concentrated from an aqueous liquid by a substrate, facilitating the detection of the second biological derivative.
    Type: Application
    Filed: October 28, 2011
    Publication date: August 15, 2013
    Inventors: Sailaja Chandrapati, Heather M. Webb, Jeffrey C. Pederson, Kurt J. Halverson, Brian R. Engel