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:
May. 29, 1984
Filed:
Mar. 03, 1982
Robert Brownlee, Los Altos Hills, CA (US);
Jeremy W Higgins, Los Altos, CA (US);
Brownlee Labs Inc., Santa Clara, CA (US);
Abstract
A replaceable cartridge column for use in high pressure liquid chromatograph pumping systems including a solid tube having a small bore therethrough carrying a packing material. The tube and terminated by a recess at each end which extends from the rim at the end of the tube inwardly and in communication with the bore. A plastic seal plug is disposed in the recess at each end to extend slightly beyond excess the length of the tube when so disposed and carries at its outer end a coaxial frit filter. The recess is provided with a flat bottom and the plastic plug has a corresponding bottom constructed to be positioned in face-to-face sealing opposition to fluid leakage and having further a flat sealing surface at its other end to engage a sealing surface of an end fitting of the liquid chromatographic pumping system and to provide a first, primary seal therewith independent of the rim of the column tube.