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Official data from INPI

APARELHO E PROCESSO PARA VEDAÇÃO DE UM REVESTIMENTO DE POÇO

Em ExigênciaInvention Patent

Application data

Number

PI8405402

Type

Invention Patent

Filing

10/23/1984

Publication

09/03/1985

Progress at the INPI

  1. Filing10/23/84
  2. Publication09/03/85
  3. Examination10/13/87
  4. Allowance01/23/90
  5. Grant06/26/90
  6. Terminated05/14/96

The patent was granted on 06/26/1990 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: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Prad Research and Development N.V.

NL

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Inventors

C. S. (pessoa física)

MX

J. H. (pessoa física)

US

J. W. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

544.658 · 10/24/1983

US

544.659 · 10/24/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

05/30/1989

RPI 971

6.2

07/12/1988

RPI 925

Solicitação de exame técnico

#4.1

10/13/1987

RPI 886

Publicação do pedido de patente

#3.1

09/03/1985

RPI 776

Pedido de patente depositado

#2.1

01/08/1985

RPI 742

Anuidade - prazo legal encerrado

#18.2

05/14/1996

RPI 1328

Concessão da patente

#16.1

06/26/1990

RPI 1024

Notificação para pagamento de retribuição

#13.1

05/22/1990

RPI 1019

Deferimento

#9.1

01/23/1990

RPI 1003

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