Granted Patent
Utility
US 5,910,521 · App. 09/053,541
Benzoxazine polymer composition
Inventors:
Calvin K. Johnson, Jimmy Pingao Chen
Patented Case
View Patent ↗
Granted: Jun 8, 1999
Filed: Apr 1, 1998
Inventors
Calvin K. Johnson
Jimmy Pingao Chen
Assignee (at issue)
Borden Chemical, 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.