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Official data from INPI

SUBSTRATO QUE CONTÉM UM MATERIAL POLÍMERO POROSO.

ConcedidaInvention Patent

Application data

Number

PI8203734

Type

Invention Patent

Filing

06/25/1982

Publication

06/21/1983

Progress at the INPI

  1. Filing06/25/82
  2. Publication06/21/83
  3. Examination04/30/85
  4. Allowance11/10/87
  5. Grant04/26/88
  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: 04/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Unilever N.V

NL

See this company's full portfolio

Inventors

D. B. (pessoa física)

GB

Z. H. (pessoa física)

GB

Technical data

Priority claims

GB

8119739 · 06/26/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/26/1988

RPI 914

Notificação para pagamento de retribuição

#13.1

03/01/1988

RPI 906

Deferimento

#9.1

11/10/1987

RPI 890

Republicação - classificação IPC

#15.11

09/01/1987

RPI 880

Exigência - art. 36 da LPI

#6.1

03/10/1987

RPI 855

Solicitação de exame técnico

#4.1

04/30/1985

RPI 758

Publicação do pedido de patente

#3.1

06/21/1983

RPI 661

Pedido de patente depositado

#2.1

08/10/1982

RPI 616

Carta-patente expirada

#21.1

Patente extinta em 25/06/97

07/01/2008

RPI 1956

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