Granted Patent
Utility
US 5,880,248 · App. 08/041,897
Polycarbonate, copolycarbonate resin compositions and preparing method thereof
Inventors:
Takeshi Sakashita, Tomoaki Shimoda, Takashi Nagai
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Mar 13, 1998
Inventors
Takeshi Sakashita
Tomoaki Shimoda
Takashi Nagai
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.