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:
Oct. 07, 1980
Filed:
Oct. 30, 1978
Applicant:
Inventor:
Hansueli Buser, Arlesheim, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
7342 / ;
Abstract
A sample introduction system for a gas chromatograph having a chamber containing a needle for piercing a sample held in a holder and introduced into the chamber via a lock. The needle has a conical point into which a passageway opens perpendicular thereto, the passageway communicating directly with a separating column connected to the chamber. The needle is so shaped that as the sample is pushed onto the point over the entrance to the passageway the sample is sealed against the conical surface and on further penetration of the needle a gap is formed between the needle and the sample to allow ingress of a carrier gas supplied to the chamber.