Granted Patent
Utility
US 4,960,358 · App. 07/390,423
Bottom-unheading device and method for vertical vessels
Inventors:
Frank A. DiGiacomo, Alan J. Malsbury, Ronald T. Myszka
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: Aug 4, 1989
Inventors
Frank A. DiGiacomo
Alan J. Malsbury
Ronald T. Myszka
Assignee (at issue)
Foster Wheeler USA 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.