Wells – Receptacles – With separate air chamber having openable passage
Patent
1976-04-15
1978-06-13
Welsh, M. J.
Wells
Receptacles
With separate air chamber having openable passage
166295, 260 296HN, 260 296M, 260 297H, 260 297M, C08L 3500
Patent
active
040941507
ABSTRACT:
A gel-forming composition of matter comprising an aqueous solution of a mixture of certain percentages of monomeric acrylamide and monomeric N,N' methylenebisacrylamide and a polymerization catalyst and containing certain percentages of an unfired natural diatomaceous earth having a certain particle size is used in treating earthen formations around the joints of sewer pipes, whereby fluid loss from the composition into the earthen formation is substantially reduced.
REFERENCES:
patent: 3056757 (1962-10-01), Rakowitz
patent: 3136360 (1964-06-01), Ramos et al.
patent: 3223163 (1965-12-01), Koch et al.
patent: 3373814 (1968-03-01), Eilers et al.
American Cyanamid Company
Dunn James T.
Sullivan John L.
Welsh M. J.
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