Granted Patent
Utility
US 4,495,975 · App. 06/420,911
Sample treatment device
Inventors:
Karl U. Harstrom, Bengt-Åke NILSSON, Richard J. Wheeler
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Sep 21, 1982
Inventors
Karl U. Harstrom
Bengt-Åke NILSSON
Richard J. Wheeler
Assignee (at issue)
Pharmacia AB
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.