Granted Patent
Utility
US 5,485,698 · App. 07/559,938
Tree treatment capsule with radially expanding shank portion
Inventor:
Hans A. K. Merving
Patented Case
View Patent ↗
Granted: Jan 23, 1996
Filed: Jul 30, 1990
Inventor
Hans A. K. Merving
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.