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Official data from INPI

MISTURA DESSULFURANTE PARA METAL LÍQUIDO

Arquivada/ExtintaInvention Patent

Application data

Number

PI8905317

Type

Invention Patent

Filing

10/24/1989

Publication

04/30/1991

Progress at the INPI

  1. Filing10/24/89
  2. Publication04/30/91
  3. Examination07/27/93
  4. Allowance08/26/97
  5. Grant08/25/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 12/26/2012. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Aço Minas Gerais S/A - Açominas (Grupo Siderbrás)

MG, BR

Gerdau Açominas S/A

MG, BR

Inventors

G. P. (pessoa física)

BR

S. S. (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 24/10/2009

12/26/2012

RPI 2190

Alteração de nome deferida

#25.4

Alterado de: Aço Minas Gerais S/A - Açominas

11/22/2005

RPI 1820

Concessão da patente

#16.1

08/25/1998

RPI 1444

Deferimento

#9.1

08/26/1997

RPI 1395

Solicitação de exame técnico

#4.1

07/27/1993

RPI 1182

Publicação do pedido de patente

#3.1

04/30/1991

RPI 1065

Pedido de patente depositado

#2.1

12/04/1990

RPI 1044

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