Patent · US Expired

Process for preparing fluoran derivatives

US4433156A · kind A · utility

7Cited by
2References
4Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 5, 1982
Grant dateFeb 21, 1984
Priority date—
Expiry dateApr 5, 2002

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB41M5/3275
  • WIPO fieldTextile and paper machines
  • WIPO sectorMechanical engineering

Abstract

A process for preparing 3,6-bis-diarylaminofluoran derivatives which comprises reacting a 3,6-bis-arylaminofluoran derivative with an arylating agent.

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