Granted Patent
Utility
US 4,669,702 · App. 06/598,859
Erosion resistant soft seated valve trim
Inventor:
Dale S. Tripp
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Apr 11, 1984
Inventor
Dale S. Tripp
Assignee (at issue)
White Consolidated Industries, 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.