Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism
Reexamination Certificate
2005-10-25
2005-10-25
Sniezek, Andrew L. (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
C360S097030, C428S065100
Reexamination Certificate
active
06958876
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 SF6and/or S2F10.
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U.S. Appl. No. 09/916,857, filed on Jul. 27, 2001, entitled, “Disk Drive Lubricant Reservoir Systems and Lubricants Used Therein”, invented by T.A. Gregory; O. Melroy; T.M. Reith; and R.J. Waltman.
Feliss Norbert A.
Gillis Donald R.
Gregory Thomas A.
Lee Sylvia Lui
Raman Vedantham
Hitachi Global Storage Technologies - Netherlands B.V.
Konrad Raynes & Victor LLP
Raynes Alan S.
Sniezek Andrew L.
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