Granted Patent
Utility
US 5,154,732 · App. 07/463,462
Apparatus for gasifying or combusting solid carbonaceous
Inventors:
Bertel K. Hakulin, Jorma Nieminen
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Jan 11, 1990
Inventors
Bertel K. Hakulin
Jorma Nieminen
Assignee (at issue)
A. Ahlstrom 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.