Patent · US Expired

1, 2-dihydro-2-oxo-1, 8-naphthyridine derivative

US7067528B2 · kind B2 · utility

0Cited by

2References

5Claims

0Family size

Assignee

Sumitomo Pharmaceuticals Company Limited · JP

Inventors

Masami Muraoka · Toyonaka, JP
Satoshi Ohnuma · Kawasaki, JP
Hitoshi Ban · Osaka, JP

Key dates

Filing date	Aug 14, 2002
Grant date	Jun 27, 2006
Priority date	—
Expiry date	Aug 9, 2023

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61P43/00
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Hydrates of N-[1-butyl-4-[3-[3-(hydroxy)propoxy]-phenyl]-1,2-dihydro-2-oxo-1,8-naphthyridin-3-yl]-N′-(2,6-diisopropyl-4-aminophenyl)urea hydrochloride of the formula: are quite excellent in stability than amorphous one and are more preferable for medicaments.

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