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:
Jan. 20, 1976
Filed:
Oct. 29, 1974
Applicant:
Inventor:
John N Driscoll, Revere, MA (US);
Assignee:
HNU Systems Inc., Newton Upper Falls, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; H01J / ;
U.S. Cl.
CPC ...
2323 / ; 2325 / ; 250423 ;
Abstract
Apparatus for and method of photoinization in which a gas permeable membrane is extended across a chamber in a housing dividing said chamber into two subchambers, a ballast chamber having a gas inlet and a gas outlet on one side of said membrane, and a photoionization chamber having detection electrodes and a radiation source on the other side of said membrane, gases from a sample stream being diffused into said photoionization chamber through said membrane.