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Official data from INPI

CELULA ELETROLITICA COM UMA MEMBRANA APERFEICOADA DE TROCA IONICA E PROCESSO PARA OPERACAO

ConcedidaInvention Patent
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Application data

Number

PI8103718

Type

Invention Patent

Filing

06/11/1980

Publication

03/02/1982
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Progress at the INPI

  1. Filing06/11/80
  2. Publication03/02/82
  3. Examination04/24/84
  4. Allowance05/17/88
  5. Grant12/27/88
  6. Terminated09/13/94

The patent was granted on 12/27/1988 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 12/27/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO

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Inventors

C. W. (pessoa física)

E. B. (pessoa física)

M. W. (pessoa física)

Technical data

IPC Classification

C25B 13/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/27/1988

RPI 949

Notificação para pagamento de retribuição

#13.1

09/06/1988

RPI 933

Deferimento

#9.1

05/17/1988

RPI 917

Exigência - art. 36 da LPI

#6.1

11/03/1987

RPI 889

Exigência - art. 36 da LPI

#6.1

05/28/1985

RPI 762

6.2

11/20/1984

RPI 735

Solicitação de exame técnico

#4.1

04/24/1984

RPI 705

Publicação do pedido de patente

#3.1

03/02/1982

RPI 593

Anuidade - prazo legal encerrado

#18.2

09/13/1994

RPI 1241

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