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:
Jan. 13, 1987
Filed:
May. 22, 1985
Jack L Hoffa, Brea, CA (US);
Maurice N Karkar, Costa Mesa, CA (US);
American Hospital Supply Corporation, Evanston, IL (US);
Abstract
A reference liquid-containing calibration cell for the calibration of a sensor for measuring a gaseous or non-gaseous constituent parameter of a fluid includes a chamber containing the reference liquid. The chamber is sealed to prevent loss of the reference liquid, and provides for communication between the sensor and a reference constituent present in the reference liquid. The chamber includes a gas-inleting port sealed by a first semi-permeable membrane which is permeable to a gaseous fluid constituent but impermeable to the reference liquid and non-gaseous reference constituents present in the reference liquid, the chamber further including a gas vent.