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Official data from INPI

LÂMINA SEGMENTADA PARA VEDAÇÃO DE GÁS EM PORTAS DE FORNOS DE COQUE

Prazo de SigiloInvention Patent

Application data

Number

PI8804758

Type

Invention Patent

Filing

09/15/1988

Publication

05/08/1990

Progress at the INPI

  1. Filing09/15/88
  2. Publication05/08/90
  3. Examination07/23/91
  4. Allowance10/03/95
  5. Grant09/24/96
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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

Usinas Siderúrgicas de Minas Gerais S/A - Usiminas

MG, BR

See this company's full portfolio

Inventors

G. F. (pessoa física)

BR

J. C. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

10/31/1989

RPI 993

Carta-patente expirada

#21.1

Patente extinta em 15/09/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

09/24/1996

RPI 1347

Retificação

#15.6

07/23/1996

RPI 1338

Alteração de numeração

#15.1

03/26/1996

RPI 1321

15.5

03/26/1996

RPI 1321

Deferimento

#9.1

10/03/1995

RPI 1296

Solicitação de exame técnico

#4.1

07/23/1991

RPI 1077

Publicação do pedido de patente

#3.1

05/08/1990

RPI 1017

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