Granted Patent
Utility
US 5,773,521 · App. 08/574,795
Coupling to produce inside-out star polymers with expanded cores
Inventors:
Ronald J. Hoxmeier, Arthur R. Bean
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Dec 19, 1995
Inventors
Ronald J. Hoxmeier
Arthur R. Bean
Assignee (at issue)
SHELL OIL 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.