US PATENT SUBCLASS 507 / 123
.~.~.~.~ Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding


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}
117  DF  .~.~ Organic component is solid synthetic resin {1}
118  DF  .~.~.~ Resin is polymer derived from ethylenic monomers only (e.g., maleic, itaconic, etc.) {5}
123.~.~.~.~ Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding


DEFINITION

Classification: 507/123

Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding:

(under subclass 118) Composition wherein said polymer contains a nitrogen containing hetero ring which is attached to an ethylenic moiety directly or indirectly by nonionic bonding.

(1) Note. A hetero ring as part of a mere counterion to an ethylenic moiety is not a basis for including such a composition in this subclass. For example, a pyridinium poly(vinyl sulfate) is classified in subclass 122. An additional cross reference in subclass 130 is highly recommended (see subclass 100, (5) Note).

(2) Note. The term "hetero ring" denotes a ring having carbon and at least one atom from the group consisting of

nitrogen, oxygen, sulfur, selenium, and tellurium as ring members and contains no other element as a ring member. As the term relates to this subclass, nitrogen must be one of the hetero atoms in the ring.