Particles, method of preparing said particles and uses thereof
April 11, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLow birefringence encapsulated liquid crystal and optical shutter using same Structured aqueous detergent compositions containing salting-out electrolytes and surfactants and methods of forming them Dispensing devices powered by lyotropic liquid crystals Dispensing devices powered by lyotropic liquid crystals Method and composition for controlled delivery of biologically active agents Method of preparing controlled-release preparations for biologically active materials and resulting compositions Controlled release composition for a biologically active material dissolved or dispersed in an L2-phase Patent #: 5371109 InventorsAssigneeApplicationNo. 211293 filed on 04/11/1994US Classes:252/299.01, LIQUID CRYSTAL COMPOSITIONS424/1.21, Molecular bilayer structure (e.g., vesicle, liposome)424/450, Liposomes424/455, Containing emulsions, dispersions, or solutions428/402, Particulate matter (e.g., sphere, flake, etc.)435/4, MEASURING OR TESTING PROCESS INVOLVING ENZYMES OR MICRO-ORGANISMS; COMPOSITION OR TEST STRIP THEREFORE; PROCESSES OF FORMING SUCH COMPOSITION OR TEST STRIP514/2, Peptide containing (e.g., protein, peptones, fibrinogen, etc.) DOAI514/937, DISPERSION OR EMULSION514/964, SUSTAINED OR DIFFERENTIAL RELEASE TYPE516/56, The agent contains organic compound containing phosphorus (e.g., lecithin)516/70, The compound contains plural peptide linkages, i.e., compound formed from amino acids, natural or synthetic, by reaction of a carboxyl group of one such amino acid with an amino group of another same or different such amino acid516/76, The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)516/900LIQUID CRYSTAL MATERIAL OF, OR FOR, COLLOID SYSTEM (E.G., G PHASE)ExaminersPrimary: Wu, Shean C.Attorney, Agent or FirmForeign Patent References
International ClassesC09K 019/00A61K 009/66 B01J 013/00 AbstractParticles, especially colloidal particles, comprising an interior phase of a non-lamellar reversed cubic, intermediate or hexagonal liquid crystalline phase, or a homogeneous L3 phase, and a surface phase of a lamellar crystalline or liquid crystalline phase, or an L3 phase. A method of preparing such particles by creating a local dispersible phase, within the homogeneous phase, preferably by means of a fragmentation agent, and fragmentating the homogeneous phase so as to form said surface phase. Several medical as well as non-medical uses of the particles referred to, e.g. as an antigen-presenting system, as a delivery system for anticancer, antifungal and antimicrobial drugs, and as carriers of nucleic acids or nucleotides.Other References
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