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Official data from INPI

DISPOSITIVO DE BLOQUEIO HIDRÁULICO

DeferidaUtility Model

Application data

Number

MU6400083

Type

Utility Model

Filing

01/24/1984

Publication

08/27/1985

Progress at the INPI

  1. Filing01/24/84
  2. Publication08/27/85
  3. Examination08/25/87
  4. Allowance08/29/89
  5. Grant04/24/90
  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.

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Latest action published by the INPI: 08/29/1989. 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

D. C. (pessoa física)

BR

J. T. (pessoa física)

BR

W. B. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Deferimento

#9.1

08/29/1989

RPI 984

Exigência - art. 36 da LPI

#6.1

04/11/1989

RPI 964

Solicitação de exame técnico

#4.1

08/25/1987

RPI 879

Publicação do pedido de patente

#3.1

08/27/1985

RPI 775

Pedido de patente depositado

#2.1

04/10/1984

RPI 703

Carta-patente expirada

#21.1

10/04/1994

RPI 1244

Concessão da patente

#16.1

04/24/1990

RPI 1015

Notificação para pagamento de retribuição

#13.1

01/09/1990

RPI 1001

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