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Official data from INPI

VÁLVULA DE COMPRESSÃO PARA AMORTECEDORES.

ConcedidaInvention Patent

Application data

Number

PI8104744

Type

Invention Patent

Filing

07/23/1981

Publication

03/01/1983

Progress at the INPI

  1. Filing07/23/81
  2. Publication03/01/83
  3. Examination08/30/83
  4. Allowance07/24/84
  5. Grant03/26/85
  6. Expired11/12/96

The letters patent expired on 11/12/1996: 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: 03/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

COFAP - Companhia Fabricadora de Peças.

SP, BR

See this company's full portfolio

Inventors

L. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/26/1985

RPI 753

Notificação para pagamento de retribuição

#13.1

11/13/1984

RPI 734

Deferimento

#9.1

07/24/1984

RPI 718

8.1

05/02/1984

RPI 706

Solicitação de exame técnico

#4.1

08/30/1983

RPI 671

Publicação do pedido de patente

#3.1

03/01/1983

RPI 645

Carta-patente expirada

#21.1

11/12/1996

RPI 1354

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