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:
Nov. 26, 2002
Filed:
Oct. 16, 2001
Minoru Numoto, Mitaka, JP;
Shigeyuki Honma, Mitaka, JP;
Tokyo Seimitsu Co., Ltd., Mitaka, JP;
Abstract
In the wafer polishing device, a retainer ring can be attached and detached with ease. Under a retainer ring attaching part disposed on a head body, a retainer ring is attached with a snap ring. The snap ring is divided into two. An upper projection part and a lower projection part are formed on the inner periphery of the snap ring. The upper projection part is fitted to an upper groove formed on the outer periphery of the retainer ring attaching part, and the lower projection part is fitted to a lower groove formed on the outer periphery of the retainer ring. In attachment, the retainer ring is connected to the lower part of the retainer ring attaching part, and the snap ring is placed on the outer periphery of the joint.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile