Granted Patent
Utility
US 5,716,634 · App. 08/743,697
Clear, homogenized, flowable hydrogel of crosslinked N-vinyl lactam polymer
Inventors:
Susan Y. Tseng, Jui-Chang Chuang, Philip F. Wolf
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: Nov 6, 1996
Inventors
Susan Y. Tseng
Jui-Chang Chuang
Philip F. Wolf
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.