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Official data from INPI

PROCESSO PARA PREPARAÇÃO DE ÁCIDO DIFENILÉTER CARBOXÍLICOS

ConcedidaInvention Patent

Application data

Number

PI8100660

Type

Invention Patent

Filing

02/04/1981

Publication

-

Progress at the INPI

  1. Filing02/04/81
  2. Publication
  3. Examination
  4. Allowance11/12/85
  5. Grant06/24/86
  6. Expired03/19/96

The letters patent expired on 03/19/1996: 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: 06/24/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Imperial Chemical Industries Limited

GB

Imperial Chemical Industries Plc.

GB

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Inventors

K. A. (pessoa física)

M. J. (pessoa física)

T. A. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

8004607 · 02/12/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/24/1986

RPI 818

Notificação para pagamento de retribuição

#13.1

04/15/1986

RPI 808

Deferimento

#9.1

11/12/1985

RPI 786

Exigência - art. 36 da LPI

#6.1

01/29/1985

RPI 745

Exigência - art. 36 da LPI

#6.1

04/03/1984

RPI 702

Carta-patente expirada

#21.1

03/19/1996

RPI 1320

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