Granted Patent
Utility
US 6,372,349 · App. 09/644,727
High-resistivity carbon black
Inventors:
Hideyuki Hisashi, Satoru Arata, Yuuichi Sekine
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Aug 23, 2000
Inventors
Hideyuki Hisashi
Satoru Arata
Yuuichi Sekine
Assignees (at issue)
MITSUBISHI CHEMICAL CORPORATION
MIKUNI-COLOR 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.