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Official data from INPI

PROCESSO E APARELHO PARA A RETIRADA UMIDA DE METAIS NO PROCESSO PARA A PURIFICACAO E RECUPERACAO DE PO RECOLHIDO EM UM FORNO

ConcedidaInvention Patent
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Application data

Number

PI7705688

Type

Invention Patent

Filing

08/27/1976

Publication

-
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Progress at the INPI

  1. Filing08/27/76
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant08/30/83
  6. Expired07/13/93

The letters patent expired on 07/13/1993: 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: 08/30/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

G. H. (pessoa física)

M. K. (pessoa física)

RASA TRADING CO LTD

Inventors

M. K. (pessoa física)

Technical data

IPC Classification

C21B 3/04C22B 19/00C22B 19/30

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/30/1983

RPI 671

Notificação para pagamento de retribuição

#13.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

Exigência - art. 36 da LPI

#6.1

07/06/1982

RPI 611

15.0

03/23/1982

RPI 596

Exigência - art. 36 da LPI

#6.1

12/15/1981

RPI 582

Carta-patente expirada

#21.1

07/13/1993

RPI 1180

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