Patent · US Expired

System for the controlled-rate release of active substances

US4839177A · kind A · utility

193Cited by

6References

25Claims

0Family size

Assignee

JAGOTEC AG · CH

Inventors

Paolo Colombo · Padova, IT
Aldo La Manna · Pavia, IT
Ubaldo Conte · Busto Arsizio, IT

Key dates

Filing date	Dec 9, 1986
Grant date	Jun 13, 1989
Priority date	—
Expiry date	Dec 9, 2006

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K9/209
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A system for the controlled-rate release of active substances, consisting of: PA0 (a) a deposit-core comprising the active substance and having defined geometric form; PA0 (b) a support-platform applied to said deposit-core. Said deposit-core contains, mixed with the active substance, a polymeric material having a high degree of swelling on contact with water or aqueous liqids, a gellable polymeric material, said polymeric materials being replaceable by a single polymeric material having both swelling and gelling properties, and other adjuvants able to provide the mixture with suitable characteristics for its compression and for its intake of water.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.