Granted Patent
Utility
US 5,940,247 · App. 08/824,667
Magnetic recording device with spindle motor lubricant of specified amine and carbamate concentrations/ratios
Inventors:
Thomas E. Karis, Holavanahally Seshachar Nagaraj
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Mar 26, 1997
Inventors
Thomas E. Karis
Holavanahally Seshachar Nagaraj
Assignee (at issue)
International Business Machines Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.