Microparticulate material and method of making such material
Patent 3959457 Issued on May 25, 1976. Estimated Expiration Date: 
May 25, 1993. 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.
May 25, 1993. 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 References 2386157 2688598 2947645 3043782 3265630 InventorsAssigneeApplicationNo. 330476 filed on 02/08/1973US Classes:424/1.25, Dissolving or eluting from solid or gel matrix (e.g., capsule, tablet)264/4, ENCAPSULATING NORMALLY LIQUID MATERIAL424/1.33, Delivery to active site involves particle dissolving, degrading, or otherwise releasing of radionuclide424/469, Discrete particles in supporting matrix424/479, Containing polysaccharide (e.g., sugar, etc.)424/480, Cellulose or derivative424/481, Containing natural gums or resins424/482, Containing solid synthetic polymers424/494, Cellulose derivatives424/496, Containing natural gums/resins424/497, Containing solid synthetic polymers424/498, Containing waxes, higher fatty acids, higher fatty alcohols, or derivatives thereof427/213.3, Solid encapsulation process utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)428/402.24, Microcapsule with solid core (includes liposome)514/297Acridines (including hydrogenated)ExaminersPrimary: Lovering, Richard D.Attorney, Agent or FirmInternational ClassA61K 9/50 (20060101)AbstractIn a finely dispersed emulsion of a water immiscible solution of an organic polyfunctional Lewis base and an aqueous solution of a partially hydrophilic, partially lipophilic polyfunctional Lewis acid, a reaction occurs at the phase interface to produce a novel microparticulate material comprised of the reaction product of the Lewis acid and the Lewis base. The maximum particle size dimensions of the microparticulate material depends on the degree of dispersion in the emulsified reaction mixture and may be as low as 2 microns or smaller. | |
