Granted Patent
Utility
US 5,196,507 · App. 07/822,926
Process for producing granules of polycarbonate and composition thereof
Inventors:
Yoshiyuki Totani, Masakatsu Nakatsuka, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Jan 21, 1992
Inventors
Yoshiyuki Totani
Masakatsu Nakatsuka
Akihiro Yamaguchi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.