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Official data from INPI

VÁLVULA DE SEGURANÇA E/OU ALÍVIO DE PRESSÃO.

ConcedidaInvention Patent

Application data

Number

PI8401723

Type

Invention Patent

Filing

04/13/1984

Publication

11/19/1985

Progress at the INPI

  1. Filing04/13/84
  2. Publication11/19/85
  3. Examination06/17/86
  4. Allowance08/02/88
  5. Grant07/25/89
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CBV Industria Mecanica S.A

RJ, BR

See this company's full portfolio

Inventors

A. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/25/1989

RPI 979

Notificação para pagamento de retribuição

#13.1

11/29/1988

RPI 945

Deferimento

#9.1

08/02/1988

RPI 928

Exigência - art. 36 da LPI

#6.1

11/24/1987

RPI 892

Pedido de certificado de adição de invenção

#5.1

10/14/1986

RPI 834

Solicitação de exame técnico

#4.1

06/17/1986

RPI 817

Publicação do pedido de patente

#3.1

11/19/1985

RPI 787

Pedido de patente depositado

#2.1

06/26/1984

RPI 714

Carta-patente expirada

#21.1

Patente extinta em 13/04/99

07/08/2008

RPI 1957

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