Granted Patent
Utility
US 4,774,228 · App. 07/130,884
Polypeptide cartilage-inducing factors found in bone used in tissue proliferation
Inventors:
Saeid Seyedin, Thomas N. Thomas, Hanne Bentz, Larry R. Ellingsworth, Rosa Armstrong
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Dec 10, 1987
Inventors
Saeid Seyedin
Thomas N. Thomas
Hanne Bentz
Larry R. Ellingsworth
Rosa Armstrong
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.