Patent · US Expired

Isomeric diaminobenzophenonedicarboxylic acids and method for preparing same

US4234743A · kind A · utility

1Cited by
1References
3Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 17, 1979
Grant dateNov 18, 1980
Priority date—
Expiry dateMay 17, 1999

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C229/66
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

3,3'-diamino-4,4'-benzophenonedicarboxylic acid, 4,4'-diamino-3,3'-benzophenonedicarboxylic acid and 3,4'-diamino-3',4-benzophenonedicarboxylic acid and process for preparing same.

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