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:
Feb. 25, 1992
Filed:
May. 03, 1989
Daniel L Newhouse, Harrisburg, MO (US);
Leemer Cernohlavek, Fulton, MO (US);
Philip D Lochhaas, Ashland, MO (US);
Analytical Bio-Chemistry Laboratories, Inc., Columbia, MO (US);
Abstract
Automated gel permeation chromatography of multiple individual samples is effected with high precision and high speed utilizing a common sample sizing loop into which each sample is placed prior to its injection into the chromatography column, thereby eliminating the need for precisely matched sample loops. Each sample is pre-stored in its own container, the containers being automatically sequentially accessed to feed a portion of the contained sample medium to the common sample sizing loop. The common sample flow path, including the sample sizing loop is automatically cleaned with rinse solvent between loading of successive samples into the sizing loop. Multiple programs may be employed to control the processing times for different types of sample fluid. A sample container closure member having a unique sealing insert member is provided to preclude leakage of fluid from the sample storage container when the container is pressurized.