Granted Patent
Utility
US 4,358,111 · App. 06/250,505
Pressurized, non-refillable recreation ball inflated with sulfur hexafluoride
Inventors:
John Papinsick, John J. Oransky, Shivaji Sircar
Patented Case
View Patent ↗
Granted: Nov 9, 1982
Filed: Apr 2, 1981
Inventors
John Papinsick
John J. Oransky
Shivaji Sircar
Assignee (at issue)
Air Products and Chemicals, 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.