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Official data from INPI

Válvula de descarga.

ConcedidaInvention Patent

Application data

Number

PI8100678

Type

Invention Patent

Filing

02/05/1981

Publication

10/05/1982

Progress at the INPI

  1. Filing02/05/81
  2. Publication10/05/82
  3. Examination08/09/83
  4. Allowance07/31/84
  5. Grant03/26/85
  6. Expired03/19/96

The letters patent expired on 03/19/1996: 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: 03/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Nordon Industrias Metalurgicas S/A

SP, BR

Inventors

R. F. (pessoa física)

BR

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

07/31/1984

RPI 719

Exigência - art. 36 da LPI

#6.1

02/07/1984

RPI 694

Solicitação de exame técnico

#4.1

08/09/1983

RPI 668

Publicação do pedido de patente

#3.1

10/05/1982

RPI 624

Alteração de sede deferida

#25.7

07/08/1997

RPI 1388

Carta-patente expirada

#21.1

03/19/1996

RPI 1320

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