Granted Patent
Utility
US 6,266,587 · App. 09/319,538
Method for determining the times when it will be necessary to change, or add to, the engine oil in a motor vehicle engine
Inventors:
Thomas Guertler, Markus Harfmann, Klaus Land, Rudolf Thom
Patented Case
View Patent ↗
Granted: Jul 24, 2001
Filed: Jun 8, 1999
Inventors
Thomas Guertler
Markus Harfmann
Klaus Land
Rudolf Thom
Assignee (at issue)
Daimlerchrysler AG
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.