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Official data from INPI

PROCESSO PARA TROCA DE CARCAÇA DE CONVERTEDOR

PublicadaInvention Patent

Application data

Number

PI8704139

Type

Invention Patent

Filing

08/11/1987

Publication

02/21/1989

Progress at the INPI

  1. Filing08/11/87
  2. Publication02/21/89
  3. Examination01/08/91
  4. Allowance01/14/92
  5. Grant02/16/94
  6. Terminated12/31/96

The patent was granted on 02/16/1994 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/21/1989. 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

H. K. (pessoa física)

BR

M. M. (pessoa física)

BR

R. G. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

02/21/1989

RPI 957

Pedido de patente depositado

#2.1

09/13/1988

RPI 934

Anuidade - prazo legal encerrado

#18.2

12/31/1996

RPI 1361

Concessão da patente

#16.1

02/16/1994

RPI 1211

Notificação para pagamento de retribuição

#13.1

03/09/1993

RPI 1162

Retificação

#15.6

12/29/1992

RPI 1152

Retificação

#15.3

06/16/1992

RPI 1124

Deferimento

#9.1

01/14/1992

RPI 1102

Solicitação de exame técnico

#4.1

01/08/1991

RPI 1049

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