Granted Patent
Utility
US 4,519,798 · App. 06/411,555
Absorptive structure
Inventor:
Richard L. Dinius
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Aug 25, 1982
Inventor
Richard L. Dinius
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.