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Official data from INPI

PROCESSO PARA PRODUÇÃO DE FIBRA REFRATÁRIA DE CAOLIM COM BAIXO ENCOLHIMENTO

Em AnáliseInvention Patent

Application data

Number

PI8606623

Type

Invention Patent

Filing

04/28/1986

Publication

08/04/1987

Progress at the INPI

  1. Filing04/28/86
  2. Publication08/04/87
  3. Examination11/24/87
  4. Allowance04/06/93
  5. Grant08/31/93
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 11/24/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Morgan Crucible Company Plc

GB

See this company's full portfolio

Inventors

L. O. (pessoa física)

US

W. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

738.820 · 05/29/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/24/1987

RPI 892

Notificação de entrada na fase nacional - PCT

#1.3

08/04/1987

RPI 876

Carta-patente expirada

#21.1

Patente extinta em 28/04/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

08/31/1993

RPI 1187

Deferimento

#9.1

04/06/1993

RPI 1166

14.1

12/29/1992

RPI 1152

Exigência - art. 36 da LPI

#6.1

05/26/1992

RPI 1121

Exigência - art. 36 da LPI

#6.1

11/05/1991

RPI 1092

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