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Official data from INPI

PROCESSO DE MANUFATURA DE UM CORPO DE CERÂMICA TENDO FUROS CONTÍNUOS

Em ExigênciaInvention Patent

Application data

Number

PI8503971

Type

Invention Patent

Filing

08/20/1985

Publication

06/03/1986

Progress at the INPI

  1. Filing08/20/85
  2. Publication06/03/86
  3. Examination11/18/86
  4. Allowance06/01/93
  5. Grant10/26/93
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 05/02/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Kurosaki Refractories Co., Ltd.

JP

See this company's full portfolio

Inventors

T. K. (pessoa física)

JP

T. M. (pessoa física)

JP

Technical data

IPC Classification

Priority claims

JP

59-174692 · 08/21/1984

JP

59-182271 · 08/30/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

05/02/1989

RPI 967

Solicitação de exame técnico

#4.1

11/18/1986

RPI 839

Publicação do pedido de patente

#3.1

06/03/1986

RPI 815

Pedido de patente depositado

#2.1

10/22/1985

RPI 783

Carta-patente expirada

#21.1

Patente extinta em 20/08/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

10/26/1993

RPI 1195

Deferimento

#9.1

06/01/1993

RPI 1174

Exigência - art. 36 da LPI

#6.1

09/29/1992

RPI 1139

Exigência - art. 36 da LPI

#6.1

12/10/1991

RPI 1097

Conhecimento de parecer técnico

#7.1

05/14/1991

RPI 1067

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