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:
Mar. 06, 2001
Filed:
Dec. 16, 1999
Cathleen H. Chang, Renton, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
An improved alkaline cleaning solution that has the ability to descale, derust, and completely dissolve machining lubricants coated on steel and other iron alloy objects, the alkaline cleaning solution consisting essentially of: (a) water; (b) about 10% to 95% by volume of a water-soluble descaling and derusting agent; and (c) about 2% to 8% by weight of a water-soluble sequestering agent selected from the group consisting of sodium gluconate and its functional equivalents. A process for descaling, derusting, and completely dissolving and removing machining lubricants coated on steel and other iron alloy objects, the process comprising the steps of: (a) providing an alkaline cleaning solution consisting essentially of water, about 10% to 95% by volume of a water-soluble descaling and derusting agent, and about 2% to 8% by weight of a water-soluble sequestering agent selected from the group consisting of sodium gluconate and its functional equivalents; and (b) contacting the object with the alkaline cleaning solution at a temperature of about 120° F. to 140° F. for about 15 to 35 minutes, whereby the object is descaled, derusted, and the machining lubricant is completely dissolved and removed.