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Official data from INPI

DISPOSITIVO PARA DETECTAR O PONTO DE BLOQUEIO DOS TUBOS EM UMA SONDAGEM

ConcedidaInvention Patent

Application data

Number

PI8102371

Type

Invention Patent

Filing

04/30/1980

Publication

12/22/1981

Progress at the INPI

  1. Filing04/30/80
  2. Publication12/22/81
  3. Examination12/06/83
  4. Allowance12/16/86
  5. Grant08/25/87
  6. Terminated06/20/95

The patent was granted on 08/25/1987 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 08/25/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PRAD RES & DEV NV

Inventors

M. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/25/1987

RPI 879

Notificação para pagamento de retribuição

#13.1

05/05/1987

RPI 863

Deferimento

#9.1

12/16/1986

RPI 843

Exigência - art. 36 da LPI

#6.1

02/12/1986

RPI 799

Exigência - art. 36 da LPI

#6.1

07/30/1985

RPI 771

Republicação - classificação IPC

#15.11

05/07/1985

RPI 759

Exigência - art. 36 da LPI

#6.1

12/18/1984

RPI 739

Solicitação de exame técnico

#4.1

12/06/1983

RPI 685

Publicação do pedido de patente

#3.1

12/22/1981

RPI 583

Anuidade - prazo legal encerrado

#18.2

06/20/1995

RPI 1281

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