Compositions – Leather or fur treating
Patent
1984-03-23
1986-02-25
Guynn, Herbert B.
Compositions
Leather or fur treating
252 85C, C09K 700
Patent
active
045727899
ABSTRACT:
A drilling fluid additive comprising a complex compound or complex compounds, at least one compound to be selected out of a group of compounds of titanium, zirconium and hafnium belonging to group IVb of the periodic table and, as desired, at least one lignin ensures, for a long period, significantly improved mud functions even at elevated temperatures under high pressure such as encountered in the depths of the earth.
REFERENCES:
patent: 3479287 (1969-11-01), Floyd et al.
patent: 4052448 (1977-10-01), Schulz et al.
patent: 4220585 (1980-09-01), Javora et al.
patent: 4235728 (1980-11-01), Schulz et al.
Iida Toyoshi
Nakamura Masaru
Sato Yutaka
Uemura Michio
Guynn Herbert B.
Japan Metals and Chemicals Co., Ltd.
Kilby Catherine S.
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