Granted Patent
Utility
US 4,925,982 · App. 07/220,887
Production of isocyanate compounds
Inventors:
Satoshi Urano, Ryuzo Mizuguchi
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Jun 16, 1988
Inventors
Satoshi Urano
Ryuzo Mizuguchi
Assignee (at issue)
NIPPON PAINT HOLDINGS CO., LTD.
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.