Granted Patent
Utility
US 5,212,249 · App. 07/783,441
Method for preparing asymmetric radial polymers
Inventors:
Gary Richie, Raymond C. Tsiang, Ronald J. Hoxmeier, Arthur R. Bean, Harvey E. Atwood
Patented Case
View Patent ↗
Granted: May 18, 1993
Filed: Oct 28, 1991
Inventors
Gary Richie
Raymond C. Tsiang
Ronald J. Hoxmeier
Arthur R. Bean
Harvey E. Atwood
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.