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. 14, 1989
Filed:
Apr. 25, 1986
William T Saunders, Both of Weirton, WV (US);
Warren D Livingston, Both of Weirton, WV (US);
Weirton Steel Corporation, Weirton, WV (US);
Abstract
Composite-coated flat-rolled steel can stock processing and product for fabrication of drawn one-piece cup-shaped work product or can end walls. Single or double-reduced flat-rolled steel, after cleaning, is chemically treated to apply a chrome oxide coating of about three hundred (300) to five hundred (500) micrograms per square foot to each substrate surface followed by utilization of a dual-organic coating system with application and curing of an organic primer to each chemically-treated surface of the substrate followed by application and curing of an added organic coating on at least one such substrate surface; such composite-coating process resulting in an exterior surface of a drawn can body or end wall having at least about two and one-half (2.5) to about five (5) milligrams of organic coating per square inch and an interior can surface with organic coating weight of at least about seven and one-half (7.5) to ten (10) milligrams per square inch. In cup forming applications, both such surfaces are lubricated with a suitable lubricant approved for food and beverage usage prior to cupping and any redraw operation.