Granted Patent
Utility
US 4,472,107 · App. 06/404,761
Rotary fluid handling machine having reduced fluid leakage
Inventors:
Ching-Ming Chang, Ross H. Sentz
Patented Case
View Patent ↗
Granted: Sep 18, 1984
Filed: Aug 3, 1982
Inventors
Ching-Ming Chang
Ross H. Sentz
Assignee (at issue)
Union Carbide 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.