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Official data from INPI

Aperfeiçoamento em túnel de avaço sob pressão.

Em AnáliseInvention Patent
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Application data

Number

PI8505487

Type

Invention Patent

Filing

10/23/1985

Publication

03/25/1986
View on INPI

Progress at the INPI

  1. Filing10/23/85
  2. Publication03/25/86
  3. Examination09/30/86
  4. Allowance
  5. Grant
  6. In force

Published on 03/25/1986, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

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Latest action published by the INPI: 08/22/1989. 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. D. (pessoa física)

Technical data

IPC Classification

E21D 9/06

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Conhecimento de parecer técnico

#7.1

08/22/1989

RPI 983

Solicitação de exame técnico

#4.1

09/30/1986

RPI 832

Solicitação de exame não realizada

#4.2

07/15/1986

RPI 821

Publicação antecipada

#3.2

03/25/1986

RPI 805

Pedido de patente depositado

#2.1

01/14/1986

RPI 795

137

08/13/1991

RPI 1080

Retificação

#15.3

10/02/1990

RPI 1035

Indeferimento

#9.2

06/05/1990

RPI 1021

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