Granted Patent
Utility
US 5,176,865 · App. 07/622,212
Pultrusion method for condensation resin injection
Inventors:
Frank C. Beall, Johan D. Koppernaes
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Nov 30, 1990
Inventors
Frank C. Beall
Johan D. Koppernaes
Assignee (at issue)
Weyerhaeuser NR 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.