Granted Patent
Utility
US 4,404,050 · App. 06/427,495
Water-in-oil emulsion blasting agents containing unrefined or partly refined petroleum product as fuel component
Inventors:
William J. Yorke, Rejean Binet, Ming C. Lee, Howard A. Bampfield
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Sep 29, 1982
Inventors
William J. Yorke
Rejean Binet
Ming C. Lee
Howard A. Bampfield
Assignee (at issue)
C-I-L, 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.