PROCESSO CONTÍNUO PARA NEUTRALIZAÇÃO DOS EFLUENTES SULFÚRICOS DOS PROCESSOS DE ELETRO-HIDRODIMERIZAÇÃO DA ACRILONITRILA COM REMOÇÃO SIMULTÂNEA DE CÁTIONS CHUMBO PROVENIENTES DA CORROSÃO DO ÂNODO E REDUÇÃO DO TEOR EM SULFATO DESSES EFLUENTES

1. Filing02/01/85
2. Publication09/09/86
3. Examination10/11/88
4. Allowance09/19/89
5. Grant05/29/90
6. In force02/01/05

The patent was granted on 05/29/1990 and is in force until 02/01/2005. Until then, no one may make, use or sell the invention in Brazil without the owner's authorisation.

Protection valid until:02/01/2005

Latest action published by the INPI: 09/19/1989. We update with every new RPI gazette, published weekly.