Granted Patent
Utility
US 4,483,773 · App. 06/604,412
Narrow bore micro-particulate column packing process and product
Inventor:
Frank Yang
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: Apr 30, 1984
Inventor
Frank Yang
Assignee (at issue)
Varian, Inc.
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.