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:
Aug. 30, 1988
Filed:
Oct. 15, 1987
Thyssen Industrie AG, , DE;
Abstract
Improved small dendrite arm spacings and good technical values, regarding the technical properties of aluminum alloys, particularly tensile strength, yield strength and elongation percent, can be reliably obtained by refining the grain of the casting to provide the smallest possible spacings between the secondary dendrite arms, by casting the aluminum alloys in a ceramic mold provided with numerous micro-sized rough spots and pores and to the inner wall of which mold after it is dried and fired has been applied a thin layer of a salt mixture in which the cations are primarily from the alkalis and/or alkaline earths and the anions are primarily from halogens and which applied salt mixture has a liquidus temperature lower than the casting temperature of the alloy.