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Official data from INPI

PROCESSO DE REDUÇÃO DIRETA DE ÓXIDOS DE METAL CONTENDO FERRO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9003744

Type

Invention Patent

Filing

07/31/1990

Publication

09/03/1991

Progress at the INPI

  1. Filing07/31/90
  2. Publication09/03/91
  3. Examination12/17/91
  4. Allowance09/23/97
  5. Grant08/25/98
  6. Expired01/22/13

The letters patent expired on 01/22/2013: 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: 01/22/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

C. C. (pessoa física)

VE

Inventors

H. C. (pessoa física)

VE

O. G. (pessoa física)

VE

Technical data

IPC Classification

Priority claims

US

455,232 · 12/22/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 31/07/2010

01/22/2013

RPI 2194

Concessão da patente

#16.1

08/25/1998

RPI 1444

Deferimento

#9.1

09/23/1997

RPI 1399

6.2

03/19/1996

RPI 1320

Solicitação de exame técnico

#4.1

12/17/1991

RPI 1098

Publicação do pedido de patente

#3.1

09/03/1991

RPI 1083

Pedido de patente depositado

#2.1

02/05/1991

RPI 1053

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