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. 28, 1999
Filed:
Jul. 13, 1998
Gen-ichi Uematsu, Sagamihara, JP;
Tosoh Corporation, , JP;
Abstract
A liquid chromatograph apparatus has a precolumn and an analyzing column which are connected through a 8-port-two-position-switching valve wherein the switching valve is capable of switching between two movable positions wherein a flow path for a solvent directing from the precolumn to the analyzing column is formed in one of the two movable positions; a flow path for the solvent directing from the analyzing column to the precolumn is formed in the other of the two movable positions, and the flow paths formed in the two movable positions are such that flowing directions of the solvent in the precolumn are opposite and flowing directions of the solvent in the analyzing column are the same.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile