Granted Patent
Utility
US 5,697,776 · App. 08/671,812
Vortex burner
Inventors:
John J. Van Eerden, A. John Grever, John J. Bloomer
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Jun 25, 1996
Inventors
John J. Van Eerden
A. John Grever
John J. Bloomer
Assignee (at issue)
Selas Corporation of America
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.