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Official data from INPI

PROCESSO PARA BENEFICIAMENTO DE UM MATERIAL CONTENDO OXIDO DE FERRO EM COMBINACAO COM OXIDO DE CROMO, E MATERIAL ASSIM BENEFICIADO

ConcedidaInvention Patent
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Application data

Number

PI8001038

Type

Invention Patent

Filing

02/21/1979

Publication

-
View on INPI

Progress at the INPI

  1. Filing02/21/79
  2. Publication
  3. Examination09/14/82
  4. Allowance01/15/85
  5. Grant07/30/85
  6. Expired05/16/95

The letters patent expired on 05/16/1995: 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: 07/30/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

LAPORTE INDUSTRIES LTD

Inventors

R. M. (pessoa física)

Technical data

IPC Classification

C22B 1/10

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/30/1985

RPI 771

Notificação para pagamento de retribuição

#13.1

05/07/1985

RPI 759

Deferimento

#9.1

01/15/1985

RPI 743

Exigência - art. 36 da LPI

#6.1

04/24/1984

RPI 705

Exigência - art. 36 da LPI

#6.1

11/01/1983

RPI 680

Solicitação de exame técnico

#4.1

09/14/1982

RPI 621

Carta-patente expirada

#21.1

05/16/1995

RPI 1276

Pedido de licença compulsória

#20.1

03/30/1993

RPI 1165

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