US PATENT SUBCLASS 424 / 1.21
.~ Molecular bilayer structure (e.g., vesicle, liposome)

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}
1.21.~ Molecular bilayer structure (e.g., vesicle, liposome)

DEFINITION

Classification: 424/1.21

Molecular bilayer structure (e.g., vesicle, liposome):

(under subclass 1.11) Subject matter which includes a

structure typically characterized by molecules having a hydrophilic end or a hydrophobic end which are organized into a bilayer so as to produce an enclosed volume, an organized layer, or a coating.

(1) Note. The radionuclide or intended radionuclide may be attached to the wall structure or may be enclosed within it or may be exterior to it or any combination thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.17, for cells and sub-cellular structures which may have bilayer structures forming a part thereof.

2+, for liposome intended for testing or measuring a condition or substance and not containing a radionuclide.

450, for liposomes containing compositions of this class other than radionuclide containing, and other than intended for testing or measuring a condition or substance.

SEE OR SEARCH CLASS 264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

4+, for generic, or not elsewhere provided for, processes of encapsulating a material which is a liquid (at ambient temperature and pressure) utilizing an emulsion or dispersion (e.g., making microsphere, liposome).

427, Coating Processes,

213.3+, for generic, or not elsewhere provided for, processes of encapsulating a solid material utilizing an emulsion or dispersion (e.g., making microcapsule, liposome).

428, Stock Material or Miscellaneous Articles,

402.2+, and 402.24 for generic, or not elsewhere provided for, liposomes, per se.

436, Chemistry: Analytical and Immunological Testing,

829, for in vitro antigen-antibody testing involving liposomes.