Granted Patent
Utility
US 5,041,469 · App. 07/578,966
Formation of discrete polyalkylene carbonate particles by solvent/non-solvent precipitation
Inventors:
Donald E. Hostetler, Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Sep 6, 1990
Inventors
Donald E. Hostetler
Michael J. Cannarsa
Haven S. Kesling, Jr.
Hsiang-Ning Sun
Assignee (at issue)
Arco Chemical Technology, L.P.
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.