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:
Jul. 12, 2005
Filed:
Jan. 22, 2003
Applicants:
James Samsoondar, Cambridge, CA;
Ashwani Kaushal, Mississauga, CA;
Inventors:
James Samsoondar, Cambridge, CA;
Ashwani Kaushal, Mississauga, CA;
Assignee:
NIR Diagnostics Inc., Waterloo, CA;
Primary Examiner:
Int. Cl.
CPC ...
G01J001/10 ;
U.S. Cl.
CPC ...
Abstract
The present invention provides a photometric reference member comprising PTFE and glass. The member exhibits an absorbance change of less than 0.0001 absorbance units per degree C. over a range of temperatures, preferably from about 20° C. to about 40° C., and over wavelengths from about 600 nm to about 1650 nm, preferably about 600 nm to about 1050 nm. The invention also pertains to methods of using the photometric reference member to correct for temperature variations or drift in absorbance measurements.