Granted Patent
Utility
US 4,252,779 · App. 06/033,402
Synthetic imogolite
Inventor:
Victor C. Farmer
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Apr 26, 1979
Inventor
Victor C. Farmer
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.