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:
Aug. 24, 2004
Filed:
Sep. 26, 2001
Applicant:
Inventors:
Richard Hovan, Doylestown, PA (US);
Stuart F. Metcalfe, South Yorkshire, GB;
Derek D. Stuart, Derbyshire, GB;
Assignee:
Land Instruments International, Inc., Newtown, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 2/100 ; H01L 3/300 ; F21V 1/100 ; G01J 5/02 ;
U.S. Cl.
CPC ...
G01N 2/100 ; H01L 3/300 ; F21V 1/100 ; G01J 5/02 ;
Abstract
An improved light source for use in an opacity monitor (transmissometer) that reduces the variation in light intensity across a projected light beam to enable a more accurate and stable method for measuring the opacity of gases in a stack/duct, especially at low values (e.g., <10%) of opacity while operating within specific performance requirements.