Granted Patent
Utility
US 4,271,281 · App. 06/154,184
Process for preparing styrenic polymer particles
Inventors:
Donald J. Kelley, David J. Williams, Stephen V. Slovenkai
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: May 29, 1980
Inventors
Donald J. Kelley
David J. Williams
Stephen V. Slovenkai
Assignee (at issue)
American Hoechst Corporation
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.