Granted Patent
Utility
US 6,326,428 · App. 07/920,219
Mica reinforced reaction injection molded polyurethane/polyurea
Inventor:
Frank Sanns, Jr.
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Jul 24, 1992
Inventor
Frank Sanns, Jr.
Assignee (at issue)
Bayer Aktiengesellschaft
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.