Patent · US Expired

Multi-layer granule

US4994279A · kind A · utility

48Cited by

23References

9Claims

0Family size

Assignee

Eisai Inc. · JP

Inventors

Shigeru Aoki
Keizo Uesugi · Ebeye, US
Shigeru Sakashita · Tokyo, JP
Masayoshi Kasai · Kakamigahara, JP
Masanori Kayano

Key dates

Filing date	Jan 26, 1989
Grant date	Feb 19, 1991
Priority date	—
Expiry date	Jan 26, 2009

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K9/5078
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A multi-layered granule comprises an inner, slow-releasing layer, an outer, rapid-releasing layer and an intermediate layer provided between said slow-releasing layer and said rapid-releasing layer which intermediate layer comprises a hardened oil and hydroxypropyl cellulose or methyl cellulose.

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