Patents by Inventor Britt Holmen

Britt Holmen 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).

  • Patent number: 9410878
    Abstract: The Portable Ultrafine Particle Sizer (PUPS) invention is provided. The PUPS is an instrument which can measure particle number concentration for particle sizes under 200 nanometers in-situ. The PUPS is a compact design for quick mounting on vehicles. Size discrimination is accomplished using a compact reverse Differential Mobility Analyzer (rDMA). Particle charging is accomplished using corona ionization. Concentration measurements are completed using a unique flexible printed circuit board electrode which can be removed for cleaning, disposal or chemical analysis of collected particles at the end of its in situ measurement life.
    Type: Grant
    Filed: April 20, 2014
    Date of Patent: August 9, 2016
    Assignee: The University of Vermont and State Agricultural College
    Inventors: Andrew Vize, Matthew Casari, Jeff Frolik, Britt Holmen
  • Publication number: 20150068282
    Abstract: The Portable Ultrafine Particle Sizer (PUPS) invention is provided. The PUPS is an instrument which can measure particle number concentration for particle sizes under 200 nanometers in-situ. The PUPS is a compact design for quick mounting on vehicles. Size discrimination is accomplished using a compact reverse Differential Mobility Analyzer (rDMA). Particle charging is accomplished using corona ionization. Concentration measurements are completed using a unique flexible printed circuit board electrode which can be removed for cleaning, disposal or chemical analysis of collected particles at the end of its in situ measurement life.
    Type: Application
    Filed: April 20, 2014
    Publication date: March 12, 2015
    Applicant: The University of Vermont and State Agricultural College
    Inventors: Andrew Vize, Matthew Casari, Jeff Frolik, Britt Holmen
  • Patent number: 8739602
    Abstract: The Portable Ultrafine Particle Sizer (PUPS) invention is provided. The PUPS is an instrument which can measure particle number concentration for particle sizes under 200 nanometers in-situ. The PUPS is a compact design for quick mounting on vehicles. Size discrimination is accomplished using a compact reverse Differential Mobility Analyzer (rDMA). Particle charging is accomplished using corona ionization. Concentration measurements are completed using a unique flexible printed circuit board electrode which can be removed for cleaning, disposal or chemical analysis of collected particles at the end of its in situ measurement life.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: June 3, 2014
    Assignee: The University of Vermont and State Agricultural College
    Inventors: Andrew Vize, Matthew Casari, Britt Holmen, Jeff Frolik
  • Patent number: 8666679
    Abstract: A micro-fabricated double condenser method and apparatus for the measurement of number-size distribution of airborne nanoparticles is provided. The invention is an instrument which can measure particle size under 100 nanometers in-situ. The present invention includes features such as a small nanoparticle airborne particulate analyzer, with a voltage-stable and feedback-controlled instrument package. The invention features also include a micro-fabricated nanoparticle charging and sorting device (NCaS). The present invention provides a portable, lightweight, and efficacious particle-sizing instrument that is able to effectively count and size nanoparticles over a wide range of operating conditions.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: March 4, 2014
    Assignee: The University of Vermont and State Agriculture College
    Inventors: Terence Barrett, Britt Holmen
  • Publication number: 20120099105
    Abstract: The Portable Ultrafine Particle Sizer (PUPS) invention is provided. The PUPS is an instrument which can measure particle number concentration for particle sizes under 200 nanometers The PUPS has a compact design which allows it to be mounted on vehicles with relative ease. Size discrimination is accomplished using, a compact reverse Differential Mobility Analyzer (rDMA) Particle charging is accomplished using a low-cost method for corona ionization. Concentration measurements are completed using a unique flexible printed circuit board electrode which can be easily removed for cleaning, disposal or chemical analysis of collected particles at the end of its in situ measurement life.
    Type: Application
    Filed: October 20, 2010
    Publication date: April 26, 2012
    Inventors: Andrew Vize, Matthew Casari, Britt Holmen, Jeff Frolik
  • Publication number: 20110246089
    Abstract: A micro-fabricated double condenser method and apparatus for the measurement of number-size distribution of airborne nanoparticles is provided. The invention is an instrument which can measure particle size under 100 nanometers in-situ. The present invention includes features such as a small nanoparticle airborne particulate analyzer, with a voltage-stable and feedback-controlled instrument package. The invention features also include a micro-fabricated nanoparticle charging and sorting device (NCaS). The present invention provides a portable, lightweight, and efficacious particle-sizing instrument that is able to effectively count and size nanoparticles over a wide range of operating conditions.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 6, 2011
    Inventors: Terence Barrett, Britt Holmen
  • Patent number: 7098462
    Abstract: One embodiment of the present invention provides a system for ionizing airborne particulates. The system includes an insulating substrate and a first electroplated structure on the insulating substrate. This first electroplated structure includes an anchor and a probe structure on the anchor that is separate from the insulating substrate. A second electroplated structure is included on the insulating substrate.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: August 29, 2006
    Assignee: The Regents of the University of California
    Inventors: Beelee Chua, Anthony S. Wexler, Norman C. Tien, Debbie A. Niemeier, Britt A. Holmén
  • Publication number: 20050156118
    Abstract: One embodiment of the present invention provides a system for ionizing airborne particulates. The system includes an insulating substrate and a first electroplated structure on the insulating substrate. This first electroplated structure includes an anchor and a probe structure on the anchor that is separate from the insulating substrate. A second electroplated structure is included on the insulating substrate.
    Type: Application
    Filed: January 14, 2005
    Publication date: July 21, 2005
    Inventors: Beelee Chua, Anthony Wexler, Norman Tien, Debbie Niemeier, Britt Holmen