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Official data from INPI

BLOCO REFRATÁRIO FABRICADO A PARTIR DE CONCRETO REFRATÁRIO

ConcedidaInvention Patent

Application data

Number

PI8303604

Type

Invention Patent

Filing

07/05/1983

Publication

11/29/1983

Progress at the INPI

  1. Filing07/05/83
  2. Publication11/29/83
  3. Examination01/31/84
  4. Allowance05/10/88
  5. Grant10/25/88
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 10/25/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Magnesita S/A

MG, BR

See this company's full portfolio

Inventors

D. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/25/1988

RPI 940

Notificação para pagamento de retribuição

#13.1

09/06/1988

RPI 933

Deferimento

#9.1

05/10/1988

RPI 916

Exigência - art. 36 da LPI

#6.1

12/29/1987

RPI 897

Conhecimento de parecer técnico

#7.1

06/10/1986

RPI 816

Exigência - art. 36 da LPI

#6.1

07/02/1985

RPI 767

Solicitação de exame técnico

#4.1

01/31/1984

RPI 693

Publicação antecipada

#3.2

11/29/1983

RPI 684

Pedido de patente depositado

#2.1

08/16/1983

RPI 669

Carta-patente expirada

#21.1

Patente extinta em 05/07/98

07/01/2008

RPI 1956

Anuidade - prazo legal encerrado

#18.2

05/02/1995

RPI 1274

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