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Official data from INPI

PROCESSO PARA PREPARAR DERIVADOS DE ÉTER DE DIFENILA

PublicadaInvention Patent

Application data

Number

PI8706322

Type

Invention Patent

Filing

11/23/1987

Publication

07/19/1988

Progress at the INPI

  1. Filing11/23/87
  2. Publication07/19/88
  3. Examination12/17/91
  4. Allowance04/09/96
  5. Grant03/25/97
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 07/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Imperial Chemical Industries Plc.

GB

See this company's full portfolio

Inventors

C. H. (pessoa física)

GB

D. L. (pessoa física)

GB

J. C. (pessoa física)

GB

T. M. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8628109 · 11/25/1986

GB

8725672 · 11/03/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/19/1988

RPI 926

Pedido de patente depositado

#2.1

03/01/1988

RPI 906

Carta-patente expirada

#21.1

Patente extinta em 23/11/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

03/25/1997

RPI 1373

Deferimento

#9.1

04/09/1996

RPI 1323

Exigência - art. 36 da LPI

#6.1

05/23/1995

RPI 1277

Exigência - art. 36 da LPI

#6.1

09/20/1994

RPI 1242

Solicitação de exame técnico

#4.1

12/17/1991

RPI 1098

11.8

08/27/1991

RPI 1082

Arquivamento - Art. 33 da LPI

#11.1

04/30/1991

RPI 1065

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