Title:
Restoration process
United States Patent 3013333


Inventors:
Burke, William R.
Application Number:
US67704957A
Publication Date:
12/19/1961
Filing Date:
08/08/1957
Assignee:
Pont DU.
Primary Class:
Other Classes:
72/372, 102/306
International Classes:
E21B43/117; F42D3/00
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