Granted Patent
Utility
US 5,322,898 · App. 08/114,127
Alkyl vinyl ether polymers containing a lactam functionality
Inventors:
Ratan K. Chaudhuri, Jenn S. Shih
Patented Case
View Patent ↗
Granted: Jun 21, 1994
Filed: Aug 30, 1993
Inventors
Ratan K. Chaudhuri
Jenn S. Shih
Assignee (at issue)
ISP INVESTMENTS LLC
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.