Granted Patent
Utility
US 4,708,968 · App. 07/064,354
Divinylbenzene in expandable beads for cup molding
Inventors:
Alvin R. Ingram, Adolph V. Di Giulio
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Jun 22, 1987
Inventors
Alvin R. Ingram
Adolph V. Di Giulio
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.