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Official data from INPI

APARELHAGEM E PROCESSO PARA A REDUCAO DE OXIDO DE FERRO EM PARTICULAS A FERRO METALICO COM UM COM UM REDUTOR SOLIDO

Em AnáliseInvention Patent

Application data

Number

PI7800859

Type

Invention Patent

Filing

02/16/1977

Publication

-

Progress at the INPI

  1. Filing02/16/77
  2. Publication
  3. Examination
  4. Allowance05/10/83
  5. Grant11/29/83
  6. Terminated09/18/90

The patent was granted on 11/29/1983 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 09/23/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MIDREX CORP

See this company's full portfolio

Inventors

B. D. (pessoa física)

K. B. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

09/23/1986

RPI 831

Concessão da patente

#16.1

11/29/1983

RPI 684

Notificação para pagamento de retribuição

#13.1

09/27/1983

RPI 675

Deferimento

#9.1

05/10/1983

RPI 655

Exigência - art. 36 da LPI

#6.1

06/22/1982

RPI 609

6.2

12/22/1981

RPI 583

Anuidade - prazo legal encerrado

#18.2

09/18/1990

RPI 1033

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