Granted Patent
Utility
US 5,504,187 · App. 08/279,845
Polymer granules containing little residual solvent
Inventors:
Noriyuki Kunishi, Masahiro Okamura, Takashi Tsukahara, Masahiro Takahashi
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Jul 26, 1994
Inventors
Noriyuki Kunishi
Masahiro Okamura
Takashi Tsukahara
Masahiro Takahashi
Assignee (at issue)
Idemitsu Petrochemical Co., 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.