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:
Mar. 19, 1991
Filed:
Oct. 13, 1989
Applicant:
Inventors:
Ru/ diger Ludewig, Go/ ttingen, US;
Frank Voss, Go/ ttingen, DE;
Assignee:
Lambda Physik Forschungs- und Entwicklungsgesellschaft mbH, Gottingen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 59 ; 372 35 ;
Abstract
An apparatus for purifying laser gas comprises first and second tubes 20, 22 in good thermal contact, liquid nitrogen flowing through the first tube 20 and laser gas flowing through the second tube 22. The laser gas is precooled in an arrangement of third and fourth tubes 24, 26, the laser gas to be cleaned entering the third tube 24 which opens into the second tube 22 so that precooled laser gas enters the second tube which opens into the fourth tube to effect the precooling.