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Official data from INPI

PROCESSO PARA DESSULFURIZAÇÃO DE FERROCROMO

PublicadaInvention Patent

Application data

Number

PI8900022

Type

Invention Patent

Filing

01/04/1989

Publication

08/15/1989

Progress at the INPI

  1. Filing01/04/89
  2. Publication08/15/89
  3. Examination10/16/90
  4. Allowance09/01/98
  5. Grant12/29/98
  6. Expired01/02/13

The letters patent expired on 01/02/2013: 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: 08/15/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Middelburg Steel And Alloys (Proprietary) Limited

ZA

Inventors

D. S. (pessoa física)

ZA

Technical data

IPC Classification

Priority claims

ZA

87/8300 · 01/05/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

08/15/1989

RPI 982

Pedido de patente depositado

#2.1

02/14/1989

RPI 956

Carta-patente expirada

#21.1

Patente extinta em 04/01/2009

01/02/2013

RPI 2191

Exigência de complementação da retribuição anual

#24.2

Compelmentar a retribuição da 11ª anuidade de acordo com a tabela vigente

10/05/1999

RPI 1500

Concessão da patente

#16.1

12/29/1998

RPI 1460

Deferimento

#9.1

09/01/1998

RPI 1445

Solicitação de exame técnico

#4.1

10/16/1990

RPI 1037

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