Granted Patent
Utility
US 6,403,842 · App. 09/482,641
Processes for producing poly(alkylene ether) glycol
Inventors:
Mitsuharu Kobayashi, Nobuyuki Murai
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Jan 13, 2000
Inventors
Mitsuharu Kobayashi
Nobuyuki Murai
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.