Granted Patent
Utility
US 6,303,698 · App. 09/486,921
Propylene copolymer and process for the production thereof
Inventors:
Tsutomu Ushioda, Jun Saito, Mototake Tsutsui, Yoshitoyo Yasuda, Hiroyuki Fujita, Yoshiyuki Ohgi
Patented Case
View Patent ↗
Granted: Oct 16, 2001
Filed: May 9, 2000
Inventors
Tsutomu Ushioda
Jun Saito
Mototake Tsutsui
Yoshitoyo Yasuda
Hiroyuki Fujita
Yoshiyuki Ohgi
Assignee (at issue)
Chisso Corporation
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.