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:
Jul. 21, 1992
Filed:
Sep. 11, 1990
Applicant:
Inventor:
Dov Z Glucksman, Topsfield, MA (US);
Assignee:
Bionaire, Inc., Lachine, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
55274 ; 55471 ; 55472 ;
Abstract
An indicator for indicating values of a variable condition being measured, as for example in a portable air cleaner having replaceable filters subjected to particulates in the air. The indicator is provided with an indicia scale marked off in uniformally spaced graduations with shading between the graduations being non-uniform and proportional to the condition being measured.