Granted Patent
Utility
US 5,507,306 · App. 08/173,578
Cleaning apparatus and method for cleaning internal airfoil cooling passages
Inventors:
Jeffrey D. Irvine, Jeffery S. Smith, Patrick L. Conroy
Patented Case
View Patent ↗
Granted: Apr 16, 1996
Filed: Dec 23, 1993
Inventors
Jeffrey D. Irvine
Jeffery S. Smith
Patrick L. Conroy
Assignee (at issue)
HOWMET 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.