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. 22, 1977
Filed:
Sep. 10, 1976
Dean M Ball, Norcross, GA (US);
Warren P Hendrix, Lawrenceville, GA (US);
Micromeritics Instrument Corporation, Norcross, GA (US);
Abstract
Improved method and apparatus for injecting a predetermined amount of a sample liquid into a high pressure stream of carrier liquid for introduction into a liquid chromatography column, wherein the flow of high pressure carrier liquid in the column is maintained at a substantially constant pressure and rate of flow, including periodically accumulating a precise amount of sample liquid in a primary flow path of carrier liquid to the column while automatically diverting all of the carrier liquid into a secondary flow path to the column in response to a small increase in carrier liquid pressure upstream of the sample accumulation point. Also disclosed is a three position, rotary sample injection valve having improved sealing means for introducing a sample liquid into a high pressure carrier liquid.