Back to results
US 4,234,743 AGranted
Isomeric diaminobenzophenonedicarboxylic acids and method for preparing same
AssigneeGr & Dc
InventorsJohann G. Schulz, Anatoli Onopchenko, Edward T. Sabourin
Life of this patent
Estimating the term…
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.
Claims3
A novel isomeric mixture containing 3,3'-diamino-4,4'-benzophenonedicarboxylic acid, 4,4'-diamino-3,3'-benzophenonedicarboxylic acid and 3,4'-diamono-3',4-benzophenonedicarboxylic acid.
As a new compound 3,3'-diamono-4,4'-benzophenonedicarboxylic acid.
As a new compound 3,4'-diamino-3',4-benzophenonedicarboxylic acid.
Dependencies are inferred from the claim text.