Granted Patent
Utility
US 6,184,336 · App. 09/226,862
Biodegradable poly(amino acid)s, derivatized amino acid polymers and methods for making same
Inventor:
Jiansheng Tang
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Jan 7, 1999
Inventor
Jiansheng Tang
Assignee (at issue)
Nalco Chemical Company
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.