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Official data from INPI

PROCESSO PARA INTRODUZIR AR EM UM FORNO ROTATIVO PARA A REDUCAO DIRETA DE MATERIAIS CONTENDO OXIDOS DE FERRO;FORNO ROTATIVO E APARELHO UTILIZADOS NO DITO PROCESSO

ConcedidaInvention Patent

Application data

Number

PI8100277

Type

Invention Patent

Filing

01/19/1981

Publication

09/21/1982

Progress at the INPI

  1. Filing01/19/81
  2. Publication09/21/82
  3. Examination12/04/84
  4. Allowance12/16/86
  5. Grant07/28/87
  6. Terminated08/23/94

The patent was granted on 07/28/1987 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: 07/28/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DIRECT REDUCTION CORP [US]

Inventors

B. C. (pessoa física)

K. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/28/1987

RPI 875

Notificação para pagamento de retribuição

#13.1

05/05/1987

RPI 863

Deferimento

#9.1

12/16/1986

RPI 843

Exigência - art. 36 da LPI

#6.1

03/04/1986

RPI 802

Conhecimento de parecer técnico

#7.1

08/13/1985

RPI 773

Solicitação de exame técnico

#4.1

12/04/1984

RPI 737

14.11

08/07/1984

RPI 720

14.1

05/02/1984

RPI 706

Publicação do pedido de patente

#3.1

09/21/1982

RPI 622

Anuidade - prazo legal encerrado

#18.2

08/23/1994

RPI 1238

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