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:
Nov. 19, 1985
Filed:
Sep. 07, 1984
Henri M Ruijten, Weesp, NL;
Hans De Bree, Weesp, NL;
Peter H Van Amsterdam, Weesp, NL;
Elbert Wiegers, Weesp, NL;
Duphar International Research B.V., Weesp, NL;
Abstract
The invention relates to a pre-column of pressure-resistant material for preconcentrating at elevated pressure substances to be chromatographed, which column consists of a vessel-shaped body which narrows internally towards the two ends and has means for sealing connections, upstream to an inlet tube for the liquid to be preconcentrated and downstream to a separating column. The invention also relates to a device for a liquid chromatography system, comprising one or more pre-columns, optionally one or more separating columns, and a coupling member, and to a coupling member for said device.