Granted Patent
Utility
US 4,454,234 · App. 06/335,736
Coated magnetizable microparticles, reversible suspensions thereof, and processes relating thereto
Inventor:
George H. Czerlinski
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Dec 30, 1981
Inventor
George H. Czerlinski
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.