Granted Patent
Utility
US 5,412,067 · App. 08/235,534
Preparation process of polyester
Inventors:
Hosei Shinoda, Masami Ohtaguro, Akihiro Funae, Shigeru Iimuro
Patented Case
View Patent ↗
Granted: May 2, 1995
Filed: Apr 29, 1994
Inventors
Hosei Shinoda
Masami Ohtaguro
Akihiro Funae
Shigeru Iimuro
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.