Granted Patent
Utility
US 5,889,078 · App. 08/969,748
Organic polymer compound and production therof
Inventors:
Masayuki Kuzuya, Sumio Watanabe
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Nov 13, 1997
Inventors
Masayuki Kuzuya
Sumio Watanabe
Assignee (at issue)
Eisai 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.