Granted Patent
Utility
US 4,497,638 · App. 06/178,491
Fuel gas generation for solids heating
Inventors:
Axel Johnson, Herman N. Woebcke
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Aug 15, 1980
Inventors
Axel Johnson
Herman N. Woebcke
Assignee (at issue)
Stone & Webster Engineering Corp.
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.