Granted Patent
Utility
US 4,550,001 · App. 06/586,656
Process for producing shaped articles having improved surfaces
Inventors:
Taro Suminoe, Tetsuo Ito, Yasuhiro Kiyomatsu, Takao Shimizu
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Mar 9, 1984
Inventors
Taro Suminoe
Tetsuo Ito
Yasuhiro Kiyomatsu
Takao Shimizu
Assignees (at issue)
Japan Synthetic Rubber Corporation
Ricky Contact Lens Research Institute Inc.
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.