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:
Jul. 01, 2003
Filed:
Nov. 26, 2001
Applicant:
Inventors:
Dirk Hammel, Worms, DE;
Holger Roehl, Mainz, DE;
Theo Schmitz, Gau-Algesheim, DE;
Johannes Windeln, Bodenheim, DE;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B44C 1/22 ;
U.S. Cl.
CPC ...
B44C 1/22 ;
Abstract
A method for recycling a disk having a layered structure on a glass substrate is disclosed. Initially, the disk is exposed to gaseous sulphur dioxide in a humid environment. Then, the disk is treated with hot water to remove the layered structure from the glass substrate.