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. 30, 1984
Filed:
Dec. 06, 1982
Applicant:
Inventors:
Werner B/a/ chler, Rosrath - Hoffnungsthal, DE;
Rolf Heisig, Weilerswist, DE;
Assignee:
Leybold-Heraeus GmbH, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
62 555 ; 55269 ; 62268 ; 417901 ;
Abstract
A cryopump having two refrigerator stages operable for producing progressively lower temperatures and at least one surface between the refrigerator stages and in such thermal communication therewith as to have, during operation of the refrigerator stages, temperatures which adsorb and desorb thereon at least one gas in the cryopump, having the improvement comprising: