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:
Feb. 20, 2007
Filed:
Mar. 30, 2005
Jon K. Haverstick, Butler, PA (US);
Daniel E. Bruce, Murrysville, PA (US);
Michael B. Schulman, Pittsburgh, PA (US);
Mark F. Zanella, Sr., Chicora, PA (US);
James A. Cahall, Zelienople, PA (US);
James B. Miller, Pittsburgh, PA (US);
Jon K. Haverstick, Butler, PA (US);
Daniel E. Bruce, Murrysville, PA (US);
Michael B. Schulman, Pittsburgh, PA (US);
Mark F. Zanella, Sr., Chicora, PA (US);
James A. Cahall, Zelienople, PA (US);
James B. Miller, Pittsburgh, PA (US);
Mine Safety Appliances Company, Pittsburgh, PA (US);
Abstract
A photoionization detector includes a housing, electrical contacts within the housing and an easily removable and replaceable photoionization chamber within the housing. The photoionization chamber includes a cathodic electrode and an anodic electrode which may be coated with a thin layer of material. The photoionization chamber and the associated cathodic electrode and anodic electrode are removable from within the housing as a unit. The photoionization chamber makes electrical connection with the contacts when seated within the housing regardless of the orientation of the photoionization chamber about an axis.