Granted Patent
Utility
US 6,626,663 · App. 10/219,934
Processes for redistributing heat flux on process tubes within process heaters, and process heaters including the same
Inventor:
Naiping Zhu
Patented Case
View Patent ↗
Granted: Sep 30, 2003
Filed: Aug 16, 2002
Inventor
Naiping Zhu
Assignee (at issue)
Fosbal Intellectual AG
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.