Granted Patent
Utility
US 5,643,464 · App. 08/497,573
Process for preparing a sterile, dry crosslinking agent
Inventors:
Woonza M. Rhee, Richard A. Berg, Joel Rosenblatt, Jacqueline A. Schroeder, Larry J. Braga, Thomas L. Smestad, Abigail Freeman
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jun 30, 1995
Inventors
Woonza M. Rhee
Richard A. Berg
Joel Rosenblatt
Jacqueline A. Schroeder
Larry J. Braga
Thomas L. Smestad
Abigail Freeman
Assignee (at issue)
COLLAGEN 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.