Granted Patent
Utility
US 5,637,752 · App. 08/507,258
Method for preparing cyanoacetic acid higher ester
Inventors:
Katsumi Nakamura, Yasuyuki Takayanagi, Masaaki Seya
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Aug 17, 1995
Inventors
Katsumi Nakamura
Yasuyuki Takayanagi
Masaaki Seya
Assignee (at issue)
Nitto Chemical Industry 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.