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Official data from INPI

PROCESSO PARA NITROCARBURAÇÃO DE ANÉIS METÁLICOS; ANEL DE PISTÃO; ANEL DE VEDAÇÃO; ANEL METÁLICO.

ConcedidaInvention Patent

Application data

Number

PI8207278

Type

Invention Patent

Filing

12/14/1982

Publication

10/18/1983

Progress at the INPI

  1. Filing12/14/82
  2. Publication10/18/83
  3. Examination10/01/85
  4. Allowance11/29/88
  5. Grant08/29/89
  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: 08/29/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AE PLC

GB

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Inventors

N. T. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

81.37940 · 12/16/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/29/1989

RPI 984

Notificação para pagamento de retribuição

#13.1

04/25/1989

RPI 966

Deferimento

#9.1

11/29/1988

RPI 945

Exigência - art. 36 da LPI

#6.1

06/21/1988

RPI 922

6.2

03/24/1987

RPI 857

Solicitação de exame técnico

#4.1

10/01/1985

RPI 780

Publicação do pedido de patente

#3.1

10/18/1983

RPI 678

Pedido de patente depositado

#2.1

02/08/1983

RPI 642

Carta-patente expirada

#21.1

Patente extinta em 14/12/97

07/01/2008

RPI 1956

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