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. 19, 1977
Filed:
Oct. 10, 1975
Harold Goodheim, Elnora, NY (US);
The United States Government, Washington, DC (US);
Abstract
In order to form an adherent coating of zinc stearate on the bore surfaces of a plurality of tubes grouped in parallel relation, an alkali cleaner solution is circulated therethrough from a reservoir tank and then returned to the tank by a flow of purge air which is thereafter vented to the atmosphere to remove any alkali residue from the system. A phosphate solution, an alkali neutralizer solution, and a stearate solution are, in turn, similarly circulated and returned to their respective reservoir tanks. Each circulation is followed by a corresponding circulation of hot rinse water which is also returned to its reservoir tank by the same air purge technique.