Granted Patent
Utility
US 4,882,403 · App. 07/199,957
Non-hydrous soft contact lens and process for producing the same
Inventors:
Tetsuo Itoh, Noboru Satoh, Kazuhiko Takahashi, Taro Suminoe, Takao Shimizu
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: May 27, 1988
Inventors
Tetsuo Itoh
Noboru Satoh
Kazuhiko Takahashi
Taro Suminoe
Takao Shimizu
Assignees (at issue)
Japan Synthetic Rubber Corporation
Ricky Contact Lens, 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.