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. 25, 2005
Filed:
Jul. 27, 2001
Norbert A. Feliss, Sunnyvale, CA (US);
Donald R. Gillis, San Jose, CA (US);
Thomas A. Gregory, Campbell, CA (US);
Sylvia Lui Lee, San Jose, CA (US);
Vedantham Raman, Morgan Hill, CA (US);
Norbert A. Feliss, Sunnyvale, CA (US);
Donald R. Gillis, San Jose, CA (US);
Thomas A. Gregory, Campbell, CA (US);
Sylvia Lui Lee, San Jose, CA (US);
Vedantham Raman, Morgan Hill, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A method for detecting leakage from a disk drive enclosure includes providing a lubricating composition having a lubricating material and a tag material therein. The tag material has a volatility characteristic that is amenable to analysis. The method includes measuring a concentration of the tag material in the vapor phase. By measuring a concentration of the tag material, a leak rate of the lubricating material can be determined. The lubricating composition may include a perfluoropolyether lubricating material and a halogenated sulfur tag material such as SFand/or SF.