US PATENT SUBCLASS 424 / 1.29
.~ Coated, impregnated, or colloidal particulate (e.g., microcapsule, micro-sphere, micro-aggregate, macro-aggregate)

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

1.11  DF  RADIONUCLIDE OR INTENDED RADIONUCLIDE CONTAINING; ADJUVANT OR CARRIER COMPOSITIONS; INTERMEDIATE OR PREPARATORY COMPOSITIONS {11}
1.29.~ Coated, impregnated, or colloidal particulate (e.g., microcapsule, micro-sphere, micro-aggregate, macro-aggregate) {2}
1.33  DF  .~.~> Delivery to active site involves particle dissolving, degrading, or otherwise releasing of radionuclide
1.37  DF  .~.~> Radionuclide or intended radionuclide in an organic compound

DEFINITION

Classification: 424/1.29

Coated, impregnated, or colloidal particulate (e.g., microcapsule, microsphere, micro-aggregate, macro-aggregate):

(under subclass 1.11) Subject matter in which the composition comprises a coated, impregnated, or colloidal particle wherein the radionuclide or intended radionuclide may be present in any part of the particle, coating, or impregnant (e.g., colloidal human serum albumin).

(1) Note. The core of a coated particle may comprise a solid, liquid, or gas (e.g., gas-filled glass microsphere, liquid core microcapsule). However, solid or gel core particles from which the radionuclide or intended radionuclide is eluted or dissolved are classified in subclass 1.25 above.

(2) Note. A particle coated or impregnated with a composition provided for in this class and in which the composition functions only to preserve the particle from biological attack is generally classified with the particular particle protected, for example, a lyophilized radiolabeled monoclonal antibody impregnated or coated with a Class 424 biocide would be properly classified with the lyophilized radiolabeled monoclonal antibody, per se, in Class 530.

(3) Note. The coating need not be continuous. The coating material may be adsorbed, chelated, complexed, covalently bonded, ionically bonded, or hydrogen bonded.

(4) Note. An emulsion is not proper for this subclass based solely on the "attachment" of the emulsifying agent to form a coating.

(5) Note. Particulate or particle encompasses a form of solid material of such small size that it behaves in a fluid manner (e.g., microcapsule, but not unit dose pills).

SEE OR SEARCH THIS CLASS, SUBCLASS: 1.21, for liposomes which may encapsulate or coat a particle.

1.25, for particulate material further comprising a reticulated network of solid or gel from which the radionuclide or intended radionuclide is eluted or is relased by dissolution of the network.