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Official data from INPI

DISPOSITIVO DE TRAVAMENTO PARA COLUNA DE PRODUÇAO DE POÇO

Prazo de SigiloInvention Patent

Application data

Number

PI8803107

Type

Invention Patent

Filing

06/24/1988

Publication

02/06/1990

Progress at the INPI

  1. Filing06/24/88
  2. Publication02/06/90
  3. Examination10/02/90
  4. Allowance11/03/92
  5. Grant06/29/93
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 07/11/1989. 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

J. L. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

07/11/1989

RPI 977

Carta-patente expirada

#21.1

Patente extinta em 24/06/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

06/29/1993

RPI 1178

Notificação para pagamento de retribuição

#13.1

03/23/1993

RPI 1164

Deferimento

#9.1

11/03/1992

RPI 1144

Conhecimento de parecer técnico

#7.1

03/10/1992

RPI 1110

Solicitação de exame técnico

#4.1

10/02/1990

RPI 1035

Publicação do pedido de patente

#3.1

02/06/1990

RPI 1005

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