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Official data from INPI

PROCESSO E DISPOSITIVO PARA PREPARAÇÃO DE FERRO-CROMO

Prazo de SigiloInvention Patent
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Application data

Number

PI8903941

Type

Invention Patent

Filing

08/04/1989

Publication

03/20/1990
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Progress at the INPI

  1. Filing08/04/89
  2. Publication03/20/90
  3. Examination12/17/91
  4. Allowance12/03/96
  5. Grant09/30/97
  6. Expired05/21/13

The letters patent expired on 05/21/2013: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 11/07/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

F. H. (pessoa física)

DE

Samancor Limited

ZA

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Inventors

D. U. (pessoa física)

DE

W. J. (pessoa física)

DE

Technical data

IPC Classification

C22B 5/10

Priority claims

DE

P 38 26 824.8 · 08/06/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

11/07/1989

RPI 994

Carta-patente expirada

#21.1

Patente extinta em 04/08/2009

05/21/2013

RPI 2211

Concessão da patente

#16.1

09/30/1997

RPI 1400

Notificação para pagamento de retribuição

#13.1

05/13/1997

RPI 1380

Deferimento

#9.1

12/03/1996

RPI 1357

6.2

03/12/1996

RPI 1319

14.1

12/07/1993

RPI 1201

Solicitação de exame técnico

#4.1

12/17/1991

RPI 1098

14.1

08/21/1990

RPI 1029

Publicação do pedido de patente

#3.1

03/20/1990

RPI 1010

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