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Official data from INPI

BLOCO DE TIJOLO REFRATÁRIO PERMEÁVEL A GASES.

ConcedidaInvention Patent

Application data

Number

PI8104287

Type

Invention Patent

Filing

07/06/1981

Publication

03/23/1982

Progress at the INPI

  1. Filing07/06/81
  2. Publication03/23/82
  3. Examination08/10/82
  4. Allowance01/02/85
  5. Grant08/27/85
  6. Expired10/08/96

The letters patent expired on 10/08/1996: 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: 08/27/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Arbed S.A.

LU

ARBED S.A.

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Inventors

H. B. (pessoa física)

S. F. (pessoa física)

Technical data

IPC Classification

Priority claims

LU

82.597 · 07/09/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/27/1985

RPI 775

Notificação para pagamento de retribuição

#13.1

04/23/1985

RPI 757

Deferimento

#9.1

01/02/1985

RPI 741

8.1

11/20/1984

RPI 735

Solicitação de exame técnico

#4.1

08/10/1982

RPI 616

Publicação do pedido de patente

#3.1

03/23/1982

RPI 596

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era E04C 1/06.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

10/08/1996

RPI 1349

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