Granted Patent
Utility
US 6,649,740 · App. 09/516,755
Hydratable form of keratin for use as a soil amendment
Inventors:
Robert A. Smith, Scott F. Timmons, Mark E. Van Dyke, Cheryl R. Blanchard, Arlene J. Siller-Jackson
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Mar 1, 2000
Inventors
Robert A. Smith
Scott F. Timmons
Mark E. Van Dyke
Cheryl R. Blanchard
Arlene J. Siller-Jackson
Assignee (at issue)
Keraplast Technologies, Ltd.
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.