(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

PROCESSO PARA FABRICAÇÃO DE FIBRA OU MANTA DE ESCÓRIA DE ALTO FORNO OU ACIARIA

PublicadaInvention Patent

Application data

Number

PI8705624

Type

Invention Patent

Filing

10/21/1987

Publication

05/16/1989

Progress at the INPI

  1. Filing10/21/87
  2. Publication05/16/89
  3. Examination09/25/90
  4. Allowance08/23/94
  5. Grant05/30/95
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 05/16/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Companhia Siderúrgica Nacional - CSN

RJ, BR

Companhia Siderúrgica Nacional (grupo Siderbrás)

RJ, BR

See this company's full portfolio

Inventors

P. J. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

05/16/1989

RPI 969

Pedido de patente depositado

#2.1

11/22/1988

RPI 944

Carta-patente expirada

#21.1

Patente extinta em 21/10/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

05/30/1995

RPI 1278

Notificação para pagamento de retribuição

#13.1

12/20/1994

RPI 1255

Deferimento

#9.1

08/23/1994

RPI 1238

Solicitação de exame técnico

#4.1

09/25/1990

RPI 1034

15.16

02/13/1990

RPI 1006

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.