Granted Patent
Utility
US 5,711,878 · App. 08/740,427
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Inventors:
Satoshi Ogata, Shinichi Tokudome
Patented Case
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Granted: Jan 27, 1998
Filed: Oct 29, 1996
Inventors
Satoshi Ogata
Shinichi Tokudome
Assignee (at issue)
Chisso 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.