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:
Sep. 20, 1988
Filed:
Jan. 29, 1987
Applicant:
Inventors:
Benjamin Y Liu, North Oaks, MN (US);
James W Ramsey, Golden Valley, MN (US);
Assignee:
Regents of the University of Minnesota, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F17C / ;
U.S. Cl.
CPC ...
62 50 ; 62 50 ;
Abstract
A flow visualization system usable for clean rooms to determine the flow conditions that exist during manufacture, includes a non-contaminating source of a visible stream of a fog comprising water droplets which evaporaate and leave no residue. Steam is generated in a boiler and it passed over an interface with a cryogenic material to form a high density fog generator providing a highly visible fog that is neutrally bouyant and non-contaminating.