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:
Sep. 21, 1982
Filed:
Jun. 05, 1981
Applicant:
Inventor:
Werner Gunkel, Wingerstweg, DE;
Assignee:
Merck Patent Gesellschaft mit Beschrankter Haftung, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210656 ; 55386 ; 2101982 ; 210351 ; 210352 ;
Abstract
A separation column for liquid chromatography is adjustably sealed for reducing dead space therein. The separation column is packed and an elastic diaphragm seals one end. There is spherically shaped inert material located between the packing and the elastic diaphragm with a porous frit located between the inert material and the diaphragm. A piston exerts a force on the diaphragm to stretch it longitudinally into the column thereby reducing the dead space. The frit and inert material operate to uniformly distribute the force exerted by the piston.