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. 31, 1993
Filed:
Jul. 29, 1988
Applicant:
Inventor:
Daniel Y Bieri, Paris, FR;
Assignee:
Spectrum Medical Industries, Inc., Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436178 ; 436 63 ; 436807 ; 436809 ; 422 58 ; 422101 ;
Abstract
A device for concentrating liquid specimens and the process of using the device. The device has a receptacle containing a membrane. The sample to be concentrated is placed in the receptacle on the upper surface of the membrane. A piston is then screwed down toward the upper surface of the membrane increasing the pressure above the membrane. The process for using the device involves supporting the device at a small angle from the vertical so that once the specimen has been concentrated to a given volume, the tilted membrane is exposed allowing air to reach the membrane and equalizing the pressure thereby rapidly decreasing any further concentration.