Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to JP6266983UpriorityCriticalpatent/JPS59169303U/ja
Publication of JPS59169303UpublicationCriticalpatent/JPS59169303U/ja
Application grantedgrantedCritical
Publication of JPS6315284Y2publicationCriticalpatent/JPS6315284Y2/ja
Dispositivos para a libertacao controlada de substancias activas, tendo membranas assimetricas a base de derivados de celulose, e processos para a sua preparacao