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Official data from INPI

ARRANJO PARA A SUSPENSÃO DE UM FORNO DE COZIMENTO PRA ELETRODOS

Em AnáliseInvention Patent

Application data

Number

PI8603976

Type

Invention Patent

Filing

08/20/1986

Publication

03/31/1987

Progress at the INPI

  1. Filing08/20/86
  2. Publication03/31/87
  3. Examination06/23/87
  4. Allowance07/04/89
  5. Grant02/06/90
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Elkem A/S

NO

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Inventors

H. K. (pessoa física)

NO

Technical data

IPC Classification

Priority claims

NO

853319 · 08/22/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação para pagamento de retribuição

#13.1

10/31/1989

RPI 993

Deferimento

#9.1

07/04/1989

RPI 976

Solicitação de exame técnico

#4.1

06/23/1987

RPI 870

Publicação do pedido de patente

#3.1

03/31/1987

RPI 858

Pedido de patente depositado

#2.1

03/17/1987

RPI 856

Carta-patente expirada

#21.1

Patente extinta em 20/08/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

02/06/1990

RPI 1005

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