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Official data from INPI

PLACA DE APOIO DE TRILHO FERROVIÁRIOS E SEU PROCESSO DE FABRICAÇÃO

ConcedidaInvention Patent

Application data

Number

PI8204884

Type

Invention Patent

Filing

08/16/1982

Publication

03/27/1984

Progress at the INPI

  1. Filing08/16/82
  2. Publication03/27/84
  3. Examination06/19/84
  4. Allowance04/16/85
  5. Grant10/01/85
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 10/01/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Ewem Ltd

NL

Industrial Arte Técnica S/A

RS, BR

See this company's full portfolio

Inventors

E. S. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/01/1985

RPI 780

Deferimento

#9.1

04/16/1985

RPI 756

Solicitação de exame técnico

#4.1

06/19/1984

RPI 713

Publicação do pedido de patente

#3.1

03/27/1984

RPI 701

Pedido de patente depositado

#2.1

10/13/1982

RPI 625

Carta-patente expirada

#21.1

Patente extinta em 16/08/97

07/01/2008

RPI 1956

Transferência deferida

#25.1

08/26/1997

RPI 1395

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