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. 25, 1978
Filed:
Mar. 16, 1977
Applicant:
Inventor:
Lazarus D Thomas, Maumee, OH (US);
Assignee:
Libbey-Owens-Ford Company, Toledo, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B08B / ; C03C / ;
U.S. Cl.
CPC ...
134-3 ; 65 31 ; 134 28 ; 252 793 ; 252D / ;
Abstract
Iridescent stains are removed from vitreous surfaces by contacting the surfaces with an aqueous solution of hydrochloric acid and sodium fluoride followed by rinsing the solution from the surfaces with water and, optionally, buffing the surfaces with an aqueous mixture of cerium oxide. The method provides benefits not only in cleaning efficiency but also in operational safety to personnel and absence of detrimental effects on surrounding building materials.