Granted Patent
Utility
US 4,052,199 · App. 05/597,806
Gas injection method
Inventor:
Mahesh C. Mangalick
Patented Case
View Patent ↗
Granted: Oct 4, 1977
Filed: Jul 21, 1975
Inventor
Mahesh C. Mangalick
Assignee (at issue)
Carborundum 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.