Granted Patent
Utility
US 6,046,291 · App. 09/097,895
Dentifrice composition including a solvent-free, high molecular weight uncrosslinked terpolymer of maleic anhydride, C.sub.1 -C.sub.4 alkyl ether and isobutylene
Inventors:
Huixiang Zhang, Krystyna Plochocka, William E. Prosise
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Jun 16, 1998
Inventors
Huixiang Zhang
Krystyna Plochocka
William E. Prosise
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.