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:
Oct. 15, 2002
Filed:
Apr. 17, 2000
Applicant:
Inventors:
Katsuaki Nakamura, Kitakyushu, JP;
Toru Uchida, Kitakyushu, JP;
Assignee:
Toto Ltd., Kitakyushu, JP;
Primary Examiner:
Int. Cl.
CPC ...
C22C 9/04 ;
U.S. Cl.
CPC ...
C22C 9/04 ;
Abstract
An object is to improve machinability and polishability of a brass material prepared through cold working, particularly in a brass pipe material. Before cold working, by having an &agr; phase making heat treatment step for increasing an area ratio of an &agr; phase, cold ductility can be ensured at the time of cold working. Also, after cold working, by having a &bgr; phase making heat treatment step for increasing an area ratio of a &bgr; phase, a brass material excellent in machinability and polishability can be provided.