US PATENT SUBCLASS 507 / 106
.~.~ Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.)

Current as of: June, 1999
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507 /   HD   EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY

100  DF  EARTH BORING {4}
103  DF  .~ Contains organic component {14}
106.~.~ Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.) {2}
107  DF  .~.~.~> Humate component is fossilized (e.g., lignite, leonardite, brown coal, etc.)
108  DF  .~.~.~> Lignin or humate component contains sulfur or is reacted with substance containing sulfur (e.g., lignosulfonate, etc.) {1}

DEFINITION

Classification: 507/106

Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.):

(under subclass 103) Composition which is a lignin or humate component comprising humic or polyphenolic containing substances or derivatives thereof (e.g., tannins, lignins, quebracho extract, pulp liquor, etc.).

(1) Note. Included in this subclass is a graft copolymer comprising a humate component grafted onto a polymer or resin.