Granted Patent
Utility
US 6,294,642 · App. 09/464,138
Continuous method for manufacturing polycarbonate
Inventors:
Tomoaki Shimoda, Takeshi Sakashita
Patented Case
View Patent ↗
Granted: Sep 25, 2001
Filed: Dec 16, 1999
Inventors
Tomoaki Shimoda
Takeshi Sakashita
Assignee (at issue)
General Electric Company
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.