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:
Aug. 25, 1992
Filed:
Jul. 19, 1991
Applicant:
Inventors:
Assignee:
Gelman Sciences, Inc., Ann Arbor, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
21032175 ; 21032184 ; 210406 ; 2104161 ; 210455 ; 422 99 ; 422101 ; 604406 ;
Abstract
A vacuum filter assembly for filtering a feed liquid includes a filter membrane held in a cover attachable to the filtrate container. The cover is formed with a feed liquid nipple on one side of the filter membrane, a filtrate outlet tube on the other side of the filter body, and a vacuum port. A portion of the surface of the membrane is non-wettable by the feed liquid to facilitate restarting the filtration if the filtration is interrupted. Also, the vacuum port includes a vacuum tube covered at its end by another membrane having pores permeable by air but not by the feed liquid, for fixing the maximum level of the filtrate within the filtrate container.