Granted Patent
Utility
US 4,598,006 · App. 06/729,729
Method for impregnating a thermoplastic polymer
Inventor:
Michael L. Sand
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: May 2, 1985
Inventor
Michael L. Sand
Assignee (at issue)
HERCULES LLC
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.