Granted Patent
Utility
US 5,912,312 · App. 09/071,841
Homogeneous copolymers containing vinyl pyrrolidone and 2-methylene-1,3-dioxepane and process for making same
Inventors:
Yuanzhen Zhong, Philip F. Wolf, Edward G. Malawer, Kolazi S. Narayanan
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: May 1, 1998
Inventors
Yuanzhen Zhong
Philip F. Wolf
Edward G. Malawer
Kolazi S. Narayanan
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.