Granted Patent
Utility
US 6,086,039 · App. 09/287,973
High-efficiency poppet and seat assembly
Inventors:
Thomas Sievers, Mario Fregoso
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Apr 7, 1999
Inventors
Thomas Sievers
Mario Fregoso
Assignee (at issue)
SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION
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.