Method for delivering an active ingredient by controlled time release utilizing a novel delivery vehicle which can be prepared by a process utilizing the active ingredient as a porogen
US4690825A · kind A · utility
172Cited by
20References
80Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1985 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Oct 4, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J9/286
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Delivery vehicles comprised of a polymeric bead having a network of pores with an active ingredient held within the network are provided for use in a method to provide controlled release of the active ingredient. The network of pores is substantially non-collapsible upon removal of the active ingredient and the delivery vehicles are polymerized by a process in which the active ingredient also comprises the porogen during formation of the network of pores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.