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Official data from INPI

PROCESSO PARA A PRODUÇÃO DE METAIS E/OU FERRO LIGAS E COLUNA PARA O TRATAMENTO DE MATERIAL SOLIDO PARTICULADO EM ESCOAMENTO CO-CORRENTE COM UM GÁS

PublicadaInvention Patent
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Application data

Number

PI8901888

Type

Invention Patent

Filing

04/20/1989

Publication

11/28/1989
View on INPI

Progress at the INPI

  1. Filing04/20/89
  2. Publication11/28/89
  3. Examination10/09/90
  4. Allowance
  5. Grant
  6. In force

Published on 11/28/1989, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

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Latest action published by the INPI: 11/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Elkem Technology a/s

NO

Inventors

R. E. (pessoa física)

T. B. (pessoa física)

Technical data

IPC Classification

C21B 13/00

Priority claims

NO

881690 · 04/20/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/28/1989

RPI 997

Pedido de patente depositado

#2.1

05/30/1989

RPI 971

Retificação

#15.3

11/21/1995

RPI 1303

Solicitação de exame técnico

#4.1

10/09/1990

RPI 1036

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