Granted Patent
Utility
US 4,333,969 · App. 06/219,453
Process for producing styrenic polymer beads of preferred bead size
Inventors:
Harold A. Wright, Alvin R. Ingram
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Dec 23, 1980
Inventors
Harold A. Wright
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.