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Official data from INPI

AÇO CARBONO PARA FUNDIÇAO CONTENDO NIÓBIO.

ConcedidaInvention Patent
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Application data

Number

PI8103942

Type

Invention Patent

Filing

06/23/1981

Publication

01/25/1983
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Progress at the INPI

  1. Filing06/23/81
  2. Publication01/25/83
  3. Examination02/21/84
  4. Allowance07/14/87
  5. Grant04/26/88
  6. Terminated06/27/95

The patent was granted on 04/26/1988 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 04/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Companhia Siderúrgica Nacional - CSN

RJ, BR

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Inventors

N. D. (pessoa física)

Technical data

IPC Classification

C22C 38/12

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/26/1988

RPI 914

Notificação para pagamento de retribuição

#13.1

11/10/1987

RPI 890

Deferimento

#9.1

07/14/1987

RPI 873

Exigência - art. 36 da LPI

#6.1

11/05/1985

RPI 785

Exigência - art. 36 da LPI

#6.1

09/18/1984

RPI 726

Solicitação de exame técnico

#4.1

02/21/1984

RPI 696

Publicação do pedido de patente

#3.1

01/25/1983

RPI 640

Anuidade - prazo legal encerrado

#18.2

06/27/1995

RPI 1282

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