Granted Patent
Utility
US 4,458,831 · App. 06/399,541
Variable flow dispensing device
Inventors:
Peter M. Holleran, Bruce H. Wisner
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Jul 19, 1982
Inventors
Peter M. Holleran
Bruce H. Wisner
Assignee (at issue)
W. R. Grace & Co.
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.