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:
Nov. 23, 1993
Filed:
Sep. 08, 1992
Applicant:
Inventor:
Shigeo Matsui, Tokyo, JP;
Assignee:
Japan Air Curtain Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55467 ; 55473 ; 55DI / ;
Abstract
A space surrounded by screens to provide a stable negative pressure preventing contaminated air from flowing out of the space and cleaning the contaminated air before discharged from the space. Air ports and fans are provided in the screen.