Granted Patent
Utility
US 5,653,932 · App. 08/464,870
Injection molding method for preventing formation of surface defects and mold assembly therefor
Inventors:
Hiroshi Aida, Haruhiko Yoshizaki, Takamitsu Hosoyama
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Jun 28, 1995
Inventors
Hiroshi Aida
Haruhiko Yoshizaki
Takamitsu Hosoyama
Assignee (at issue)
NIPPON STEEL CHEMICAL 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.