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Official data from INPI

VÁLVULA DE TAXA DUPLA DE FLUXO.

ConcedidaInvention Patent

Application data

Number

PI8302410

Type

Invention Patent

Filing

05/09/1983

Publication

12/18/1984

Progress at the INPI

  1. Filing05/09/83
  2. Publication12/18/84
  3. Examination07/02/85
  4. Allowance05/05/87
  5. Grant10/27/87
  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: 10/27/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Automatic Switch Company

US

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Inventors

G. L. (pessoa física)

J. L. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/27/1987

RPI 888

Notificação para pagamento de retribuição

#13.1

09/22/1987

RPI 883

Deferimento

#9.1

05/05/1987

RPI 863

Exigência - art. 36 da LPI

#6.1

03/25/1986

RPI 805

Solicitação de exame técnico

#4.1

07/02/1985

RPI 767

Publicação do pedido de patente

#3.1

12/18/1984

RPI 739

Pedido de patente depositado

#2.1

06/28/1983

RPI 662

Carta-patente expirada

#21.1

Patente extinta em 09/05/98

07/01/2008

RPI 1956

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