Patents by Inventor Dhirajlal G. Parekh

Dhirajlal G. Parekh 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).

  • Multi-purpose modular pyrolysis and thermal processing system for chemical and biological threat agent detection
    Patent number: 7360394
    Abstract: A multi-purpose modular pyrolysis and thermal processing system (MPMPTPS) for pyrolyzing and/or vaporizing liquids and solids to create an evolved vapor suitable for introduction into a gas-chromatography and/or vapor detection system, thereby allowing detection, classification and/or identification characteristics of threat agents. The MPMPTPS system is capable of pyrolyzing and/or vaporizing liquid (in solution, suspension or colloidal form) and solid (in aerosol or powder form) form of biological and chemical threat agents in a manner that the evolved vapor may be introduced into Gas-Chromatography systems and/or vapor detection systems, without the use of any reagents and/or bottled gases.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: April 22, 2008
    Inventors: Dhirajlal G. Parekh, Waleed Maswadeh, Amit Limaye
  • MULTI-PURPOSE MODULAR PYROLYSIS AND THERMAL PROCESSING SYSTEM FOR CHEMICAL AND BIOLOGICAL THREAT AGENT DETECTION
    Publication number: 20080053192
    Abstract: A multi-purpose modular pyrolysis and thermal processing system (MPMPTPS) for pyrolyzing and/or vaporizing liquids and solids to create an evolved vapor suitable for introduction into a gas-chromatography and/or vapor detection system, thereby allowing detection, classification and/or identification characteristics of threat agents. The MPMPTPS system is capable of pyrolyzing and/or vaporizing liquid (in solution, suspension or colloidal form) and solid (in aerosol or powder form) form of biological and chemical threat agents in a manner that the evolved vapor may be introduced into Gas-Chromatography systems and/or vapor detection systems, without the use of any reagents and/or bottled gases.
    Type: Application
    Filed: August 3, 2005
    Publication date: March 6, 2008
    Inventors: Dhirajlal G. Parekh, Waleed Maswadeh, Amit Limaye
  • Biological classification system
    Patent number: 6672133
    Abstract: A hand-held chemical vapor detector for detecting biological substances in an indoor and outdoor setting is claimed. More specifically, the present invention relates to a plasma chromatograph (PC) vapor detector that is interfaced to a biological sample processing and transfer introduction system. The biological sample processing was accomplished by quartz tube thermal decomposition (TD), and the resultant vapor was transferred by gas chromatography (GC) to the PC detector. This system is comprised of a thermal decomposition module, gas chromatography module and a plasma chromatograph detector. These components are connected in a series fashion. The device is referred to as a Biological Classifier System (BCS). The BCS can be described as a hyphenated device where two analytical dimensions (the GC and PC), in series, allow the separation and isolation of individual components from the thermal decomposition of biological analytes.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: January 6, 2004
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Waleed M. Maswadeh, Dhirajlal G. Parekh, A. Peter Snyder, Ashish Tripathi