公开(公告)号：US3896126A

公开(公告)日：1975-07-22

申请号：US37229873

申请日：1973-06-21

Applicant: BASF AG

Inventor： OBERLINNER ANDREAS ,  BAUMANN HANS ,  GRYCHTOL KLAUS

IPC: B41M5/136 ,  B41M5/15 ,  C07D491/10 ,  C07D491/107 ,  C09B57/00 ,  C07D51/78

CPC classification number: C07D491/10 ,  B41M5/15

Abstract: Spiropyrans based on 1,2,3,4-tetrahydroquinoline compounds, a process for their manufacture and their use as dye-forming components in copying processes.