Granted Patent
Utility
US 5,200,448 · App. 07/860,310
Freeze-thaw stable polyacrylamide emulsions
Inventors:
Peter M. Robinson, Martin Jenkins
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Mar 27, 1992
Inventors
Peter M. Robinson
Martin Jenkins
Assignee (at issue)
Exxon Chemical Patents, Inc.
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.