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Official data from INPI

PROCESSO PARA PRODUÇÃO DE ÓXIDO DE FERRO DE ALTA REATIVIDADE E ALTA SUPERFÍCIE ESPECÍFICA

PublicadaInvention Patent

Application data

Number

PI8706002

Type

Invention Patent

Filing

11/09/1987

Publication

05/30/1989

Progress at the INPI

  1. Filing11/09/87
  2. Publication05/30/89
  3. Examination09/17/91
  4. Allowance12/20/94
  5. Grant07/25/95
  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.

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Latest action published by the INPI: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

C. D. (pessoa física)

MG, BR

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Inventors

J. P. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

05/30/1989

RPI 971

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Carta-patente expirada

#21.1

Patente extinta em 09/11/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

07/25/1995

RPI 1286

Notificação para pagamento de retribuição

#13.1

05/02/1995

RPI 1274

Deferimento

#9.1

12/20/1994

RPI 1255

15.15

09/13/1994

RPI 1241

Exigência - art. 36 da LPI

#6.1

05/03/1994

RPI 1222

Solicitação de exame técnico

#4.1

09/17/1991

RPI 1085

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