Granted Patent
Utility
US 4,517,316 · App. 06/573,497
Porous irrigation pipe prepared from particulate elastomer and thermoplastic binder containing controlled moisture content
Inventor:
James Mason
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Jan 24, 1984
Inventor
James Mason
Assignee (at issue)
Dasurat Enterprises PTE, Ltd.
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.