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Official data from INPI

DISPOSITIVO PARA DETEÇÃO DE PARTÍCULAS EM SISTEMA DE LUBRIFICAÇÃO DE MANCAIS DE DESLIZAMENTO

PublicadaInvention Patent

Application data

Number

PI8706665

Type

Invention Patent

Filing

12/09/1987

Publication

07/04/1989

Progress at the INPI

  1. Filing12/09/87
  2. Publication07/04/89
  3. Examination02/13/91
  4. Allowance12/24/91
  5. Grant11/24/92
  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.

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Latest action published by the INPI: 07/04/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A - Usiminas

MG, BR

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Inventors

W. F. (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

03/29/1988

RPI 910

Carta-patente expirada

#21.1

Patente extinta em 09/12/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

11/24/1992

RPI 1147

Notificação para pagamento de retribuição

#13.1

05/19/1992

RPI 1120

Deferimento

#9.1

12/24/1991

RPI 1099

Solicitação de exame técnico

#4.1

02/13/1991

RPI 1054

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