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. 17, 1990
Filed:
Apr. 24, 1989
Applicant:
Inventor:
Benjamin Y Liu, North Oaks, MN (US);
Assignee:
Regents of the University of Minnesota, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; G01N / ;
U.S. Cl.
CPC ...
55270 ; 55337 ; 55356 ; 55429 ; 7386323 ;
Abstract
A cyclone type personal aerosol sampler has a two-stage operation with a standard cyclone sampler providing a cutoff of particles in the range of 10 microns to a secondary cyclone sampler. The secondary cyclone sampler has the ability to inertially separate out particles below about 0.8 microns from larger particles. The secondary sampler has a readily removable cup for collecting the larger particles, and an easily replaceable filter for collecting the smaller particles for analysis.