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Official data from INPI

DIAFRAGMA METALICO PARA SEPARAR O COMPARTIMENTO DO ANODO DA CELULA ELETROLITICA E PROCESSO PARA PREDETERMINAR A CONVENIENCIA DO DIAFRAGMA METALICO

Em AnáliseInvention Patent

Application data

Number

PI7803046

Type

Invention Patent

Filing

05/15/1978

Publication

-

Progress at the INPI

  1. Filing05/15/78
  2. Publication
  3. Examination
  4. Allowance04/17/84
  5. Grant10/30/84
  6. Terminated09/18/90

The patent was granted on 10/30/1984 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: 09/09/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO

See this company's full portfolio

Inventors

J. D. (pessoa física)

J. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

09/09/1986

RPI 829

Concessão da patente

#16.1

10/30/1984

RPI 732

Notificação para pagamento de retribuição

#13.1

08/07/1984

RPI 720

Deferimento

#9.1

04/17/1984

RPI 704

14.1

01/10/1984

RPI 690

Exigência - art. 36 da LPI

#6.1

04/19/1983

RPI 652

Exigência - art. 36 da LPI

#6.1

09/08/1982

RPI 620

Exigência - art. 36 da LPI

#6.1

02/09/1982

RPI 590

Anuidade - prazo legal encerrado

#18.2

09/18/1990

RPI 1033

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