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Official data from INPI

APARELHO PARA TESTAR A IMPERMEABILIDADE AO GÁS EM UNIÕES ENTRE TUBOS

PublicadaInvention Patent

Application data

Number

PI8701195

Type

Invention Patent

Filing

03/16/1987

Publication

01/05/1988

Progress at the INPI

  1. Filing03/16/87
  2. Publication01/05/88
  3. Examination06/12/90
  4. Allowance05/12/92
  5. Grant01/26/93
  6. Terminated12/31/96

The patent was granted on 01/26/1993 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: 01/05/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Weatherford Oil Tool Gmbh

DE

Inventors

M. J. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

DE

P 36 08814.5 · 03/15/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

01/05/1988

RPI 898

Pedido de patente depositado

#2.1

06/23/1987

RPI 870

Anuidade - prazo legal encerrado

#18.2

12/31/1996

RPI 1361

Concessão da patente

#16.1

01/26/1993

RPI 1156

Notificação para pagamento de retribuição

#13.1

10/06/1992

RPI 1140

Deferimento

#9.1

05/12/1992

RPI 1119

Solicitação de exame técnico

#4.1

06/12/1990

RPI 1022

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