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. 24, 2002
Filed:
Jul. 03, 2002
Applicant:
Inventor:
Allen F. Dageforde, Orange, CA (US);
Assignee:
Horiba Instruments, Inc., Irving, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 1/00 ;
U.S. Cl.
CPC ...
G01N 1/00 ;
Abstract
A sample of gaseous constituents, to be used in e.g. emissions testing, is collected within an inner bag having a wall that allows limited diffusion of at least one of the gaseous constituents therethrough. A control gas is then collected into an outer bag that defines an auxiliary chamber between the wall and the outside environment. The control gas controls the rate of diffusion of the at least one constituent through the wall and into the outside environment.