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Official data from INPI

APERFEIÇOAMENTOS EM TUBULAÇÕES DE AÇO OU FERRO DÚCTIL A SEREM ASSENTADOS PELO SISTEMA TÚNEL DE AVANÇO SOB PRESSÃO.

ConcedidaInvention Patent

Application data

Number

PI8503722

Type

Invention Patent

Filing

08/02/1985

Publication

02/12/1986

Progress at the INPI

  1. Filing08/02/85
  2. Publication02/12/86
  3. Examination08/26/86
  4. Allowance03/28/89
  5. Grant09/26/89
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Construtora Civil e Industrial S/A CONCISA

SP, BR

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Inventors

C. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

07/18/1989

RPI 978

Deferimento

#9.1

03/28/1989

RPI 962

Solicitação de exame técnico

#4.1

08/26/1986

RPI 827

Solicitação de exame não realizada

#4.2

06/10/1986

RPI 816

Publicação antecipada

#3.2

02/12/1986

RPI 799

Pedido de patente depositado

#2.1

10/01/1985

RPI 780

Carta-patente expirada

#21.1

Patente extinta em 02/08/2000

07/15/2008

RPI 1958

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