Granted Patent
Utility
US 4,386,133 · App. 06/355,963
Coated beads with macromonomer-styrene polymerizate coating
Inventors:
Elizabeth A. Blommers, David R. Warfel, Alvin R. Ingram
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Mar 8, 1982
Inventors
Elizabeth A. Blommers
David R. Warfel
Alvin R. Ingram
Assignee (at issue)
Atlantic Richfield Company
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.