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. 09, 1996
Filed:
May. 14, 1993
Chaoliang Yao, Missouri City, TX (US);
Dennis C Krueger, Richmond, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
A passive dosimeter with a structurally reinforced sorbent wafer is used for monitoring a worker's exposure to ambient aromatics (benzene, toluene, ethylbenzene and xylenes). The wafer is preferably formed by pressing 4 mg of sorbent material between two pieces of 100 mesh stainless steel wire gauze. The thickness of the formed pellet is about 1 mm. The wafer sorbent material design produces a much smaller background noise on gas chromatographic (GC) analysis and enhances the signal-to-noise ratio during the thermal desorption process. This enables the detection of a much lower concentration level of ambient air contaminants than other types of passive dosimeters designed for thermal desorption analysis.