Granted Patent
Utility
US 5,019,479 · App. 07/373,592
Positive type radiation-sensitive resin composition comprising a photosensitizer and a novolak resin
Inventors:
Hiroshi Oka, Chozo Okuda, Yoshinori Yoshida, Toshihiko Takahashi, Yoichi Kamoshida, Takao Miura
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Jun 30, 1989
Inventors
Hiroshi Oka
Chozo Okuda
Yoshinori Yoshida
Toshihiko Takahashi
Yoichi Kamoshida
Takao Miura
Assignee (at issue)
Japan Synthetic Rubber Corporation
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.