Granted Patent
Utility
US 6,258,891 · App. 09/442,158
Solventless process for making polysiloxane polymers
Inventor:
Ronald J. Hoxmeier
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Nov 16, 1999
Inventor
Ronald J. Hoxmeier
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.