Granted Patent
Utility
US 5,467,528 · App. 07/812,318
Method of making a tubular thermal structure
Inventors:
Daniel A. Bales, Mark L. Hartman
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: Dec 23, 1991
Inventors
Daniel A. Bales
Mark L. Hartman
Assignee (at issue)
UNITED TECHNOLOGIES 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.