Inhalation pharmaceuticals
Patent 4590206 Issued on May 20, 1986. Estimated Expiration Date: 
May 3, 2004. 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 3, 2004. 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 ReferencesSodium chromoglycate inhalation medicament Composition for treating airway disease Patent #: 4161516 InventorsAssigneeApplicationNo. 06/606542 filed on 05/03/1984US Classes:514/456, Bicyclo ring system having the hetero ring as one of the cyclos (e.g., chromones, etc.)514/826, ASTHMA514/951POWDERS, GRANULES OR PARTICLES OF SPECIFIED MESH OR PARTICLE SIZEExaminersPrimary: Schenkman, LeonardAttorney, Agent or FirmInternational ClassA61K 9/16 (20060101)Foreign Application Priority Data1981-07-24 GBAbstractThere is described a finely divided inhalation drug, e.g. sodium cromoglycate, comprising a therapeutically effective proportion of individual particles capable of penetrating deep into the lung, characterized in that a bulk of the particles which is both unagglomerated and unmixed with a coarse carrier, is sufficiently free flowing to be filled into capsules on an automatic filling machine and to empty from an opened capsule in an inhalation device. A number of the individual drug particles have a spherical, collapsed spherical or ring doughnut shape.There is also described a method of making the fine particles and pharmaceutical formulations containing them.Other References
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