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:
May. 19, 1992
Filed:
Apr. 04, 1991
Applicant:
Inventor:
Carl E van der Smissen, Lubeck, DE;
Assignee:
Dragerwerk Aktiengesellschaft, Lubeck, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A62B / ;
U.S. Cl.
CPC ...
12820527 ; 12820528 ;
Abstract
An impregnation for respirator filters, filled with active carbon, containing at least two of the known vanadium, copper, manganese, and zinc compounds, which occur as the vanadate, oxide, carbonate, or chloride, with addition of an oxo acid, shall be improved such that the stability of the respirator filters during storage will be improved. To accomplish this task, tungstic acid, molybdic acid, permanganic acid, stannic acid, or phosphoric acid is added.