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Official data from INPI

SISTEMA PARA PROTEÇÃO DO USUÁRIO DE ESMERIL

ConcedidaUtility Model

Application data

Number

MU6400951

Type

Utility Model

Filing

06/20/1984

Publication

01/28/1986

Progress at the INPI

  1. Filing06/20/84
  2. Publication01/28/86
  3. Examination02/17/88
  4. Allowance03/28/89
  5. Grant10/24/89
  6. Expired10/04/94

The letters patent expired on 10/04/1994: 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: 10/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais - USIMINAS (Grupo Siderbrás)

MG, BR

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Inventors

J. B. (pessoa física)

BR

J. A. (pessoa física)

BR

J. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/24/1989

RPI 992

Notificação para pagamento de retribuição

#13.1

07/18/1989

RPI 978

Deferimento

#9.1

03/28/1989

RPI 962

Exigência - art. 36 da LPI

#6.1

10/18/1988

RPI 939

Solicitação de exame técnico

#4.1

02/17/1988

RPI 904

Publicação do pedido de patente

#3.1

01/28/1986

RPI 797

Pedido de patente depositado

#2.1

08/21/1984

RPI 722

Carta-patente expirada

#21.1

10/04/1994

RPI 1244

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