Granted Patent
Utility
US 4,955,921 · App. 07/479,891
Flushing mechanism using phase change fluid
Inventors:
Peter A. Basile, Ashvani K. Madan, Fred E. Snyder, Harold M. Stillman
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Feb 14, 1990
Inventors
Peter A. Basile
Ashvani K. Madan
Fred E. Snyder
Harold M. Stillman
Assignee (at issue)
American Standard Inc.
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.