Granted Patent
Utility
US 4,900,546 · App. 07/079,627
Bone cement for sustained release of substances
Inventors:
Jessica Dee Posey-Dowty, Paul Higham, Nestor A. Arroyo, Casper F. Stark
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Jul 30, 1987
Inventors
Jessica Dee Posey-Dowty
Paul Higham
Nestor A. Arroyo
Casper F. Stark
Assignee (at issue)
Pfizer Hospital Products Group, 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.