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. 13, 2005
Filed:
Mar. 11, 2003
Applicant:
Jacob Mettes, Boulder, CO (US);
Inventor:
Jacob Mettes, Boulder, CO (US);
Assignee:
Verity Instruments, Inc., Carrollton, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J003/443 ;
U.S. Cl.
CPC ...
Abstract
Afterglow spectroscopy allows observing light emission of gaseous species in absence of direct plasma light. This absence avoids the creation of a background spectrum obscuring weak emission from trace species. The invention describes a flowing afterglow version monitoring in-situ the cleanup of vacuum tools during pump/purge cycles. The invention also describes an intermittent afterglow version suitable for trace gas analysis at atmospheric pressure.