Patents by Inventor Gamal E. Khalil

Gamal E. Khalil 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).

  • Microbiological assessment method and device utilizing oxygen gradient sensing
    Patent number: 8173438
    Abstract: There is disclosed a biological indicator (BI) test utilizing oxygen sensing within a microenvironment as a means for determining the presence of viable microorganisms capable of growth, a method for biological indicator (BI) testing for determining the completeness of a sterilization cycle utilizing oxygen sensing as the means for determining the presence of viable microorganism survival, a device for determining oxygen content in a biological indicator (BI) assay vessel containing an optical oxygen sensor, and a method and device for determining antimicrobial drug resistance or sensitivity to a contaminated sample.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: May 8, 2012
    Assignee: Photonic BioSystems, Inc.
    Inventors: David L. Putnam, Todd W. Hubbard, Gamal E. Khalil
  • AMMONIA DETECTION AND MEASUREMENT DEVICE
    Publication number: 20100330692
    Abstract: There is disclosed an apparatus and method for detecting and measuring volatile acidic or basic components including ammonia, ammonium, or volatile amines (compound) in a gas or liquid state fluid. Specifically, the present invention provides a PTFE-carrier solid phase indicator film having an ammonia-sensitive indicator dye embedded therein, such that the dye moiety changes color or spectral properties upon exposure to the compound to be detected.
    Type: Application
    Filed: September 16, 2009
    Publication date: December 30, 2010
    Applicant: Photonic BioSystems, Inc.
    Inventors: Gamal E. Khalil, David L. Putnam, Todd W. Hubbard
  • Ammonia detection and measurement device
    Patent number: 7592184
    Abstract: There is disclosed an apparatus and method for detecting and measuring volatile acidic or basic components including ammonia, ammonium, or volatile amines (compound) in a gas or liquid state fluid. Specifically, the present invention provides a PTFE-carrier solid phase indicator film having an ammonia-sensitive indicator dye embedded therein, such that the dye moiety changes color or spectral properties upon exposure to the compound to be detected.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: September 22, 2009
    Assignee: Photonic BioSystems, Inc.
    Inventors: Gamal E. Khalil, David L. Putnam, Todd W. Hubbard
  • Ammonia detection and measurement device
    Publication number: 20030003589
    Abstract: There is disclosed an apparatus and method for detecting and measuring volatile acidic or basic components including ammonia, ammonium, or volatile amines (compound) in a gas or liquid state fluid. Specifically, the present invention provides a PTFE-carrier solid phase indicator film having an ammonia-sensitive indicator dye embedded therein, such that the dye moiety changes color or spectral properties upon exposure to the compound to be detected.
    Type: Application
    Filed: May 28, 2002
    Publication date: January 2, 2003
    Applicant: Photonic BioSystems, Inc.
    Inventors: Gamal E. Khalil, David L. Putnam, Todd W. Hubbard