Formation sealing composition
United States Patent 2213038

Inventors:
David, Vern W.
Publication Date:
08/27/1940
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Assignee:
David, Vern W.
Primary Class:
106/793
Other Classes:
106/794, 106/811, 507/140, 166/292
International Classes:
C04B28/10; C09K8/504; C04B28/00; C09K8/50