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Official data from INPI

OPERACAO APERFEICOADA E REGENERACAO DE MEMBRANAS SELETIVAMENTE PERMEAVEIS E PERMUTADORAS DE IONS NAS CELULAS PARA ELETROLISE DE SALMOURA

Em AnáliseInvention Patent
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Application data

Number

PI8207769

Type

Invention Patent

Filing

06/22/1981

Publication

05/31/1983
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Progress at the INPI

  1. Filing06/22/81
  2. Publication05/31/83
  3. Examination10/18/83
  4. Allowance05/10/88
  5. Grant02/28/89
  6. Terminated02/11/92

The patent was granted on 02/28/1989 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: 09/19/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO [US]

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Inventors

B. [. (pessoa física)

G. [. (pessoa física)

Technical data

IPC Classification

C25B 1/46

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

22.2

09/19/1989

RPI 987

Concessão da patente

#16.1

02/28/1989

RPI 958

Notificação para pagamento de retribuição

#13.1

09/06/1988

RPI 933

Deferimento

#9.1

05/10/1988

RPI 916

Exigência - art. 36 da LPI

#6.1

08/11/1987

RPI 877

Exigência - art. 36 da LPI

#6.1

03/05/1985

RPI 750

Solicitação de exame técnico

#4.1

10/18/1983

RPI 678

Notificação de entrada na fase nacional - PCT

#1.3

05/31/1983

RPI 658

Anuidade - prazo legal encerrado

#18.2

02/11/1992

RPI 1106

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