Method of preparing microspheres for intravascular delivery
US4492720A · kind A · utility
84Cited by
7References
18Claims
0Family size
Inventor
Key dates
| Filing date | Nov 15, 1983 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Nov 15, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/1694
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The field of this invention is the encapsulation of therapeutic or diagnostic substances in minute capsules or spheres from which the substances are slowly released over a prescribed period of time. The general processes for preparing such capsules or spheres include coacervation or a related process by means of which liquid droplets can be encapsulated, and solid phase entrapment in which the water-soluble agent is dispersed in a solid matrix material. The method of this invention can be classified as an improved procedure for matrix encapsulation or entrapment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.