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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UM MATERIAL POLÍMERO RETICULADO, HOMOGÊNEO, POROSO E SULFONADO.

ConcedidaInvention Patent

Application data

Number

PI8304850

Type

Invention Patent

Filing

09/06/1983

Publication

04/24/1984

Progress at the INPI

  1. Filing09/06/83
  2. Publication04/24/84
  3. Examination08/20/85
  4. Allowance09/06/88
  5. Grant07/25/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Unilever N.V

NL

See this company's full portfolio

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Priority claims

GB

8225415 · 09/07/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/25/1989

RPI 979

Notificação para pagamento de retribuição

#13.1

12/27/1988

RPI 949

Deferimento

#9.1

09/06/1988

RPI 933

Exigência - art. 36 da LPI

#6.1

03/08/1988

RPI 907

7.2

10/13/1987

RPI 886

Republicação - classificação IPC

#15.11

04/28/1987

RPI 862

Conhecimento de parecer técnico

#7.1

11/18/1986

RPI 839

Solicitação de exame técnico

#4.1

08/20/1985

RPI 774

Publicação do pedido de patente

#3.1

04/24/1984

RPI 705

Pedido de patente depositado

#2.1

11/08/1983

RPI 681

Carta-patente expirada

#21.1

Patente extinta em 06/09/98

07/01/2008

RPI 1956

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