Granted Patent
Utility
US 6,700,003 · App. 10/316,937
Process for producing a saturated cyclic ether
Inventors:
Kazuhiko Kiyooka, Toshiharu Yokoyama
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Dec 12, 2002
Inventors
Kazuhiko Kiyooka
Toshiharu Yokoyama
Assignee (at issue)
MITSUBISHI CHEMICAL 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.