Document Type and Number:
Japanese Patent JPH0236531
Kind Code:
B2
Inventors:
OOTA YUKIHIRO
Application Number:
JP17049981A
Publication Date:
August 17, 1990
Filing Date:
October 24, 1981
Export Citation:
Assignee:
OOTSUKA KAGAKU KK
International Classes:
C01G23/00; B01J39/10; C01G1/00
Next Patent: JPH0236532