Granted Patent
Utility
US 4,381,611 · App. 06/260,472
Method and apparatus for absorbing moisture
Inventor:
Marvin Wishman
Patented Case
View Patent ↗
Granted: May 3, 1983
Filed: May 4, 1981
Inventor
Marvin Wishman
Assignee (at issue)
Phillips Petroleum Company
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.