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. 24, 1998
Filed:
Oct. 03, 1996
Applicant:
Inventors:
Guy Gorinas, Sillingy, FR;
Rainer Mathes, Annecy, FR;
Alain Ravex, Grenoble, FR;
Jean-Marc Poncet, Grenoble, FR;
Assignee:
Alcatel Cit, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
62 555 ; 417901 ;
Abstract
A secondary pump unit comprising a mechanical secondary pump and a cryogenic trap, wherein the cryogenic trap forms a ring surrounding the outside of the mechanical secondary pump at its intake end, and the trap is enclosed in a casing defining, in parallel, the intake opening of the mechanical pump and of the cryogenic trap.