Granted Patent
Utility
US 4,877,563 · App. 07/251,797
Production of foamed polymer structures
Inventors:
H. Eugene Broemmelsiek, Raymond Lee, Carroll W. Lanier
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Oct 3, 1988
Inventors
H. Eugene Broemmelsiek
Raymond Lee
Carroll W. Lanier
Assignee (at issue)
Ethyl Corporation
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.