The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2008
Filed:
Feb. 15, 2006
J. Daniel Geist, Boxborough, MA (US);
Jeffrey Diep, Quincy, MA (US);
Peter Williams, Phoenix, AZ (US);
Charles W. Perkins, Boston, MA (US);
J. Daniel Geist, Boxborough, MA (US);
Jeffrey Diep, Quincy, MA (US);
Peter Williams, Phoenix, AZ (US);
Charles W. Perkins, Boston, MA (US);
Varian, Inc., Palo Alto, CA (US);
Abstract
Mass spectrometers for trace gas leak detection and methods for operating mass spectrometers are provided. The mass spectrometer includes an ion source to ionize trace gases, such as helium, a magnet to deflect the ions and a detector to detect the deflected ions. The ion source includes an electron source, such a filament. The method includes operating the electron source at an electron accelerating potential relative to an ionization chamber sufficient to ionize the trace gas but insufficient to form undesired ions, such as triply charged carbon.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile