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Official data from INPI

APERFEICOAMENTO NA CONEXAO ENTRE AS ARMACOES LATERAIS E O BALANCIM DE UM TRUQUE DE VAGAO FERROVIARIO

ConcedidaInvention Patent

Application data

Number

PI8106179

Type

Invention Patent

Filing

09/25/1981

Publication

05/03/1983

Progress at the INPI

  1. Filing09/25/81
  2. Publication05/03/83
  3. Examination09/13/83
  4. Allowance07/08/86
  5. Grant03/17/87
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 03/17/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AMSTED IND INC [US]

Inventors

N. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/17/1987

RPI 856

Notificação para pagamento de retribuição

#13.1

11/04/1986

RPI 837

Deferimento

#9.1

07/08/1986

RPI 820

Exigência - art. 36 da LPI

#6.1

11/12/1985

RPI 786

Solicitação de exame técnico

#4.1

09/13/1983

RPI 673

Publicação do pedido de patente

#3.1

05/03/1983

RPI 654

Pedido de patente depositado

#2.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

Patente extinta em 25/09/96

08/19/2008

RPI 1963

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