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Official data from INPI

MEIOS PARA SEPARAR PARTICULAS SOLIDAS E FUNDIDAS DOS GASES DE EXAUSTAO DE FORNOS METALURGICOS E MODO DE RECUPERAR O CHUMBO DESSES GASES

ConcedidaInvention Patent

Application data

Number

PI8300882

Type

Invention Patent

Filing

02/12/1982

Publication

11/16/1983

Progress at the INPI

  1. Filing02/12/82
  2. Publication11/16/83
  3. Examination03/07/84
  4. Allowance06/18/85
  5. Grant12/31/85
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 12/31/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

OUTOKUMPU OY [FI]

Inventors

T. T. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/31/1985

RPI 793

Notificação para pagamento de retribuição

#13.1

10/01/1985

RPI 780

Deferimento

#9.1

06/18/1985

RPI 765

15.9

06/05/1984

RPI 711

Solicitação de exame técnico

#4.1

03/07/1984

RPI 698

Publicação do pedido de patente

#3.1

11/16/1983

RPI 682

Pedido de patente depositado

#2.1

04/12/1983

RPI 651

Carta-patente expirada

#21.1

Patente extinta em 23/02/98

08/19/2008

RPI 1963

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