← Back to Patent Explorer
EP0585151A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process to prepare micropheres for the sustained release of LHRH-hormone, microspheres and so-obtained compositions

Assignee: Boehringer Ingelheim Animal Health France SAS
•
Filing: 1993-07-20
•
Granted: —
•
Expires: 2013-07-20
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from French Procédé pour la préparation de microsphères, pour la libération prolongée de l'hormone LHRH et de ses analogues, l'hormone étant dispersée dans une matrice polymérique ou copolymérique insoluble dans l'eau, le procédé par évaporation de solvant se caractérise par l'utilisation d'un couple de solvants organiques dont l'un permet plus spécifiquement d'obtenir une suspension homogène de l'hormone à l'état pulvérulent par simple agitation et dont l'autre est légèrement miscible à l'eau pour permettre plus spécifiquement la microdispersion de la phase organique dans la phase aqueuse dans laquelle s'effectue le durcissement des microsphères. Ce procédé conduit à la préparation de microsphères à LHRH remarquables par leur pureté, notamment à des microsphères à matrice complexe, ainsi qu'à des formulations comprenant au moins deux types de microsphères. Process for the preparation of microspheres, for the sustained release of the hormone LHRH and its analogs, the hormone being dispersed in a polymer or copolymer matrix insoluble in water, the process by evaporation of solvent is characterized by the use of a couple of organic solvents, one of which more specifically makes it possible to obtain a homogeneous suspension of the hormone in the pulverulent state by simple stirring and the other of which is slightly miscible with water to more specifically allow microdispersion of the organic phase in the aqueous phase in which the hardening of the microspheres takes place. This process leads to the preparation of LHRH microspheres remarkable for their purity, in particular to microspheres with complex matrix, as well as to formulations comprising at least two types of microspheres.

Inventors

  • 👤 Geneviève Bernadette Billot
  • 👤 Marc Maurice Teichner

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 08:38
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1641; A61K9/1647; A61K38/00; A61K38/04; A61K38/08; A61K38/09; A61K9/1682; A61K9/1694

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

EP0102265A2 Cited
WO1989005632A1 Cited
EP0330180A1 Cited
WO1991012882A1 Cited
WO1991013595A1 Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag