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Official data from INPI

PROCESSO PARA CONTROLE DA TENSÃO DE BOBINAMENTO DE CHAPAS DE AÇO

Arquivada/ExtintaInvention Patent

Application data

Number

PI8904378

Type

Invention Patent

Filing

08/31/1989

Publication

03/05/1991

Progress at the INPI

  1. Filing08/31/89
  2. Publication03/05/91
  3. Examination10/08/91
  4. Allowance11/14/95
  5. Grant10/29/96
  6. Expired12/22/09

The letters patent expired on 12/22/2009: 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: 12/22/2009. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Companhia Siderúrgica Nacional - CSN

RJ, BR

See this company's full portfolio

Inventors

I. T. (pessoa física)

BR

R. B. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 31/08/2004

12/22/2009

RPI 2033

Concessão da patente

#16.1

10/29/1996

RPI 1352

Notificação para pagamento de retribuição

#13.1

03/19/1996

RPI 1320

Deferimento

#9.1

11/14/1995

RPI 1302

6.5

05/30/1995

RPI 1278

Exigência - art. 36 da LPI

#6.1

03/07/1995

RPI 1266

Solicitação de exame técnico

#4.1

10/08/1991

RPI 1088

Publicação do pedido de patente

#3.1

03/05/1991

RPI 1057

Pedido de patente depositado

#2.1

10/23/1990

RPI 1038

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