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:
Feb. 20, 1990
Filed:
May. 08, 1987
Glenn H Fertig, Sr, Natrona Heights, PA (US);
Adrian C Billetdeaux, Allison Park, PA (US);
Mine Safety Appliances Company, Pittsburgh, PA (US);
Abstract
An infrared fluid analyzer for the detection of end tidal CO.sub.2. The analyzer is comprised of an IR source that irradiates a chamber filled with gas. CO.sub.2 present in the chamber absorbs the IR radiation at a certain wavelength. An IR detector determines the amount of IR radiation passing through the chamber unabsorbed and produces a signal corresponding to the CO.sub.2 in the chamber. At predetermined intervals a zero gas is reintroduced into the chamber for the system to be recalibrated. A span gas is only needed initially for calibration purposes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile