Granted Patent
Utility
US 5,496,921 · App. 08/327,738
Melt process for polycarbonate with improved heat stability
Inventors:
Takeshi Sakashita, Tomoaki Shimoda
Patented Case
View Patent ↗
Granted: Mar 5, 1996
Filed: Oct 24, 1994
Inventors
Takeshi Sakashita
Tomoaki Shimoda
Assignee (at issue)
GE Plastics Japan 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.