Granted Patent
Utility
US 6,007,049 · App. 08/933,812
High pressure gas valve having an inverted stem/seat design and a soft seated removable stem cartridge
Inventors:
Lloyd G. Wass, Kurt Drewelow, Claes Granfelt
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Sep 19, 1997
Inventors
Lloyd G. Wass
Kurt Drewelow
Claes Granfelt
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.