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Official data from INPI

DISPOSITIVO PARA MEDIÇÃO E CONTROLE DA PRESSÃO DE CONTACTO DAS PLACAS REFRATÁRIAS DA VÁLVULA GAVETA

Prazo de SigiloInvention Patent

Application data

Number

PI8803280

Type

Invention Patent

Filing

07/01/1988

Publication

02/13/1990

Progress at the INPI

  1. Filing07/01/88
  2. Publication02/13/90
  3. Examination02/25/92
  4. Allowance11/16/93
  5. Grant05/31/94
  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.

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Latest action published by the INPI: 12/06/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Mendes Júnior Siderurgia S.A

MG, BR

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Inventors

E. B. (pessoa física)

BR

R. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

12/06/1988

RPI 946

Carta-patente expirada

#21.1

Patente extinta em 01/07/2003

09/02/2008

RPI 1965

Cessão de direito de exploração

#22.1

12/17/1996

RPI 1359

20.4

08/02/1994

RPI 1235

Concessão da patente

#16.1

05/31/1994

RPI 1226

Deferimento

#9.1

11/16/1993

RPI 1198

Solicitação de exame técnico

#4.1

02/25/1992

RPI 1108

Publicação do pedido de patente

#3.1

02/13/1990

RPI 1006

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