Granted Patent
Utility
US 3,989,698 · App. 05/551,803
Process for preparing benzoxazines
Inventors:
Richard L. Jacobs, Richard L. Hively
Patented Case
View Patent ↗
Granted: Nov 2, 1976
Filed: Feb 20, 1975
Inventors
Richard L. Jacobs
Richard L. Hively
Assignee (at issue)
The Sherwin-Williams 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.