Process for preparation of microspheres
Patent 4384975 Issued on May 24, 1983. Estimated Expiration Date: 
June 13, 2000. 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.
June 13, 2000. 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 3429827 3575882 3577515 3872023 Process for encapsulation of medicaments Processes for preparation of microspheres Patent #: 4166800 InventorAssigneeApplicationNo. 06/159148 filed on 06/13/1980US Classes:427/213.36, Solid-walled microcapsule formed from preformed synthetic polymer264/4.1, Liquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)424/496, Containing natural gums/resins424/497, Containing solid synthetic polymers427/213.3, Solid encapsulation process utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)504/359, Microencapsulating or encapsulating agent71/64.11Controlled releaseExaminersPrimary: Lovering, Richard D.Attorney, Agent or FirmInternational ClassesA61K 9/16 (20060101)B01J 13/06 (20060101) B01J 13/12 (20060101) AbstractMicrospheres, prepared by solvent removal from an oil-in-water emulsion using carboxylic acid salt surfactant, e.g., sodium oleate as the emulsifier. | |
