US PATENT SUBCLASS 424 / 9.44
.~.~ Hetero ring containing


Current as of: June, 1999
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424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

9.1  DF  IN VIVO DIAGNOSIS OR IN VIVO TESTING {7}
9.4  DF  .~ X-ray contrast imaging agent (e.g., computed tomography, angiography, etc.) {5}
9.44.~.~ Hetero ring containing


DEFINITION

Classification: 424/9.44

Hetero ring containing:

(under subclass 9.4) Subject matter wherein the agent contains or is a heterocyclic compound.

(1) Note. A heterocyclic compound is a compound containing at least one hetero ring which is 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.

(2) Note. An example of a compound provided for herein is: [figure]