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:
Feb. 15, 1983
Filed:
Nov. 12, 1980
Applicant:
Inventor:
John C West, Minneapolis, MN (US);
Assignee:
Century Mfg. Co., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F / ;
U.S. Cl.
CPC ...
2-8 ;
Abstract
In the sight opening of the face shield of a welding helmet, a protective lens overlying a filter lens and having a light impervious coating about its edge portion blocking the passage of light rays through its edge portion and through the clearance about the lenses within the sight opening and thus eliminating the use of a gasket or other sealant about the lens first mentioned or within or about the sight opening.