Granted Patent
Utility
US 3,937,646 · App. 05/420,357
Evaporation apparatus of special material
Inventor:
James E. Houston
Patented Case
View Patent ↗
Granted: Feb 10, 1976
Filed: Nov 29, 1973
Inventor
James E. Houston
Assignee (at issue)
Hooker Chemicals & Plastics 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.