Granted Patent
Utility
US 6,568,467 · App. 10/118,241
Helical type heat exchanger having intermediate heating medium
Inventors:
Hiroaki Ohira, Kuniaki Ara
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Apr 9, 2002
Inventors
Hiroaki Ohira
Kuniaki Ara
Assignee (at issue)
Japan Nuclear Cycle Development Institute
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.