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Official data from INPI

MEMBRANAS DE ACIDO SULFONICO APERFEICOADES PARA CELULAS ELETROLITICAS

ConcedidaInvention Patent

Application data

Number

PI8103719

Type

Invention Patent

Filing

06/11/1980

Publication

03/02/1982

Progress at the INPI

  1. Filing06/11/80
  2. Publication03/02/82
  3. Examination04/24/84
  4. Allowance10/27/87
  5. Grant06/28/88
  6. Terminated09/13/94

The patent was granted on 06/28/1988 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: 06/28/1988. 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

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/28/1988

RPI 923

Notificação para pagamento de retribuição

#13.1

03/01/1988

RPI 906

Deferimento

#9.1

10/27/1987

RPI 888

Conhecimento de parecer técnico

#7.1

09/23/1986

RPI 831

Exigência - art. 36 da LPI

#6.1

01/15/1985

RPI 743

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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