国家/地区
IPC部 B（2）
IPC大类 B65（2）
IPC小类 B65D（2）
IPC
发明人
公开年
申请年
专利权人

Preparing 3-substituted 4-hydroxycoumarin compound, involves mixing 4-hydroxycoumarin derivatives with unsaturated alfa-beta-ketone, adding water, amino functional solid catalyst, heating, crystallizing viscous mass using organic solvent.

HAIDER M A, ALAM M I, AKHTAR M W, SHAHADAT M, AHMAD S Z

Graphene compound for barrier element and clear packaging for product comprises optionally functionalized graphene directly bonded to nitrogen-containing compound.

ZHENG S