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Official data from INPI

SISTEMA PARA FECHAR O TOPO DE UM ANODO SODERBERG USADO EM ASSOCIAÇÃO COM A PRODUÇÃO ELETROLÍTICA DE ALUMÍNIO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9101817

Type

Invention Patent

Filing

05/06/1991

Publication

12/17/1991

Progress at the INPI

  1. Filing05/06/91
  2. Publication12/17/91
  3. Examination03/10/92
  4. Allowance10/27/98
  5. Grant06/15/99
  6. Expired06/04/13

The letters patent expired on 06/04/2013: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 06/04/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

E. A. (pessoa física)

NO

Inventors

A. O. (pessoa física)

NO

Technical data

IPC Classification

Priority claims

NO

902000 · 05/07/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 06/05/2011

06/04/2013

RPI 2213

Concessão da patente

#16.1

06/15/1999

RPI 1484

Deferimento

#9.1

10/27/1998

RPI 1451

Exigência - art. 36 da LPI

#6.1

06/02/1998

RPI 1432

Solicitação de exame técnico

#4.1

03/10/1992

RPI 1110

Publicação do pedido de patente

#3.1

12/17/1991

RPI 1098

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