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Official data from INPI

DISPOSITIVO PARA MEDIÇÃO DO DESGASTE DO FUNDO DE CONVERSOR LD

PublicadaInvention Patent

Application data

Number

PI8706599

Type

Invention Patent

Filing

12/08/1987

Publication

07/04/1989

Progress at the INPI

  1. Filing12/08/87
  2. Publication07/04/89
  3. Examination07/24/90
  4. Allowance06/15/93
  5. Grant04/26/94
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 07/04/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Companhia Siderúrgica Nacional - CSN

RJ, BR

See this company's full portfolio

Inventors

J. C. (pessoa física)

BR

R. L. (pessoa física)

BR

W. R. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/04/1989

RPI 976

Pedido de patente depositado

#2.1

01/31/1989

RPI 954

Carta-patente expirada

#21.1

Patente extinta em 08/12/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/26/1994

RPI 1221

Notificação para pagamento de retribuição

#13.1

10/26/1993

RPI 1195

Deferimento

#9.1

06/15/1993

RPI 1176

15.15

12/03/1991

RPI 1096

15.5

09/17/1991

RPI 1085

Solicitação de exame técnico

#4.1

07/24/1990

RPI 1025

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