Granted Patent
Utility
US 4,557,463 · App. 06/599,252
Erosion resistant soft seated valve trim
Inventors:
Dale S. Tripp, Timothy E. Kunkle
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Apr 11, 1984
Inventors
Dale S. Tripp
Timothy E. Kunkle
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.