US PATENT SUBCLASS 507 / 208-- .~.~.~.~ Includes metal compound other than an alkali or alkaline earth metal compound (e.g., Al, Cr, Fe, Mn, Cu, etc.)

US PATENT SUBCLASS 507 / 208
.~.~.~.~ Includes metal compound other than an alkali or alkaline earth metal compound (e.g., Al, Cr, Fe, Mn, Cu, etc.)

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

200	DF	WELL TREATING {4}
203	DF	.~ Contains organic component {17}
206	DF	.~.~ Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.) {1}
207	DF	.~.~.~ Lignin or humate component contains sulfur or is reacted with substance containing sulfur (e.g., lignosulfonate, etc.) {1}
208		.~.~.~.~ Includes metal compound other than an alkali or alkaline earth metal compound (e.g., Al, Cr, Fe, Mn, Cu, etc.)

DEFINITION

Classification: 507/208

Includes metal compound other than an alkali or alkaline earth metal compound (e.g., Al, Cr, Fe, Mn, Cu, etc.):

(under subclass 207) Compositions which contain a metal compound where the metal is other than an alkali or alkaline earth metal (e.g., Al, Cr, Fe, Mn, Cu, etc.).

(1) Note. Alkali or alkaline earth metals include Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, and Ra.

(2) Note. Included within this subclass are compositions which contain: (i) a lignin or humate component containing sulfur or reacted with a substance containing sulfur, and (ii) a metal other than alkali or alkaline earth metal, regardless of whether the two components (i and ii) are part of the same compound.