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Official data from INPI

DISPOSITIVO PARA RESFRIAMENTO POR CORTINA D'ÁGUA DIAGONAL DE FLUXO LAMINAR.

Em ExigênciaInvention Patent
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Application data

Number

PI8400326

Type

Invention Patent

Filing

01/26/1984

Publication

09/03/1985
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Progress at the INPI

  1. Filing01/26/84
  2. Publication09/03/85
  3. Examination02/25/86
  4. Allowance03/06/90
  5. Grant10/30/90
  6. Expired07/08/08

The letters patent expired on 07/08/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 10/03/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Companhia Siderúrgica Nacional - CSN

RJ, BR

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Inventors

C. M. (pessoa física)

BR

P. J. (pessoa física)

BR

Technical data

IPC Classification

C21D 9/46C21D 9/573

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

10/03/1989

RPI 989

Exigência - art. 36 da LPI

#6.1

04/18/1989

RPI 965

Solicitação de exame técnico

#4.1

02/25/1986

RPI 801

Publicação do pedido de patente

#3.1

09/03/1985

RPI 776

Pedido de patente depositado

#2.1

04/10/1984

RPI 703

Carta-patente expirada

#21.1

Patente extinta em 26/01/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

10/30/1990

RPI 1039

Notificação para pagamento de retribuição

#13.1

06/26/1990

RPI 1024

Deferimento

#9.1

03/06/1990

RPI 1008

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