Granted Patent
Utility
US 5,750,068 · App. 08/539,598
Gas-introduced injection molding and method of obtaining the same
Inventors:
Hirofumi Gouda, Takayoshi Tanaka
Patented Case
View Patent ↗
Granted: May 12, 1998
Filed: Oct 5, 1995
Inventors
Hirofumi Gouda
Takayoshi Tanaka
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.