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Official data from INPI

MECANISMO APERFEIÇOADO PARA DESCARREGAR SÓLIDOS E CONTROLAR SEU FLUXO.

ConcedidaInvention Patent

Application data

Number

PI8300425

Type

Invention Patent

Filing

01/28/1983

Publication

09/04/1984

Progress at the INPI

  1. Filing01/28/83
  2. Publication09/04/84
  3. Examination12/04/84
  4. Allowance01/07/86
  5. Grant07/29/86
  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: 07/29/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Petróleo Brasileiro S/A - Petrobrás

RJ, BR

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Inventors

D. S. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/29/1986

RPI 823

Notificação para pagamento de retribuição

#13.1

05/06/1986

RPI 811

Deferimento

#9.1

01/07/1986

RPI 794

Exigência - art. 36 da LPI

#6.1

05/28/1985

RPI 762

Solicitação de exame técnico

#4.1

12/04/1984

RPI 737

Publicação do pedido de patente

#3.1

09/04/1984

RPI 724

Pedido de patente depositado

#2.1

03/15/1983

RPI 647

Carta-patente expirada

#21.1

Patente extinta em 28/01/98

07/01/2008

RPI 1956

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