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Official data from INPI

AÇO-LIGA REFRATÁRIO FUNDIDO PARA GRELHAS

Em AnáliseInvention Patent

Application data

Number

PI8504578

Type

Invention Patent

Filing

09/19/1985

Publication

04/22/1987

Progress at the INPI

  1. Filing09/19/85
  2. Publication04/22/87
  3. Examination07/19/88
  4. Allowance11/03/92
  5. Grant06/29/93
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 07/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Companhia Siderúrgica Paulista - COSIPA

SP, BR

See this company's full portfolio

Inventors

J. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

07/19/1988

RPI 926

Publicação do pedido de patente

#3.1

04/22/1987

RPI 861

Pedido de patente depositado

#2.1

11/19/1985

RPI 787

Carta-patente expirada

#21.1

Patente extinta em 19/09/2000

07/15/2008

RPI 1958

20.7

11/08/1994

RPI 1249

Concessão da patente

#16.1

06/29/1993

RPI 1178

Notificação para pagamento de retribuição

#13.1

03/23/1993

RPI 1164

Deferimento

#9.1

11/03/1992

RPI 1144

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