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. 27, 1981
Filed:
Mar. 19, 1980
Applicant:
Inventors:
Adrianus P Severijns, Eindhoven, NL;
Frans A Staas, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
6251 / ;
Abstract
.sup.3 He-.sup.4 He refrigerator in which superfluid .sup.4 He is circulated by a thermomechanical pumping device which is based on the fountain pump effect and which is constructed from several series-arranged fountain pumps.