Granted Patent
Utility
US 3,978,166 · App. 05/565,699
Cyclic phosphonates
Inventor:
Ingenuin Hechenbleikner
Patented Case
View Patent ↗
Granted: Aug 31, 1976
Filed: Apr 7, 1975
Inventor
Ingenuin Hechenbleikner
Assignee (at issue)
BorgWarner Inc.
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.