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Official data from INPI

SISTEMA DE ANCORAMENTO DE BLOCO REFRATÁRIO IMPERMEABILIZADO EM PORTAS DE FORNOS DE COQUE

Em AnáliseInvention Patent

Application data

Number

PI8703499

Type

Invention Patent

Filing

07/09/1987

Publication

01/24/1989

Progress at the INPI

  1. Filing07/09/87
  2. Publication01/24/89
  3. Examination11/14/89
  4. Allowance06/27/95
  5. Grant11/26/96
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 11/14/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A - Usiminas

MG, BR

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Inventors

E. L. (pessoa física)

BR

H. F. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/14/1989

RPI 995

Publicação do pedido de patente

#3.1

01/24/1989

RPI 953

Pedido de patente depositado

#2.1

09/01/1987

RPI 880

Carta-patente expirada

#21.1

Patente extinta em 09/07/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

11/26/1996

RPI 1356

15.5

04/30/1996

RPI 1326

15.19

04/09/1996

RPI 1323

Retificação

#15.3

11/14/1995

RPI 1302

Deferimento

#9.1

06/27/1995

RPI 1282

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