Granted Patent
Utility
US 4,317,023 · App. 06/210,097
Method of making slotted well screen
Inventor:
Gregory A. Gryskiewicz
Patented Case
View Patent ↗
Granted: Feb 23, 1982
Filed: Nov 24, 1980
Inventor
Gregory A. Gryskiewicz
Assignee (at issue)
UOP LLC
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.