Granted Patent
Utility
US 5,447,995 · App. 08/250,409
Method for producing asymmetric radial polymers
Inventors:
Ronald J. Hoxmeier, Bridget A. Spence
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: May 27, 1994
Inventors
Ronald J. Hoxmeier
Bridget A. Spence
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.