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Official data from INPI

SUSPENSAO ESTAVEL DE POLIMERO HIDROSSOLUVEL ,PROCESSO PARA SUA PREPARACAO ,SUA APLICACAO ,E SOLUCAO AQUOSA DE POLIMERO UTILIZAVEL PARA MELHORAR A RECUPERACAO DO PETROLEO

ConcedidaInvention Patent
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Application data

Number

PI8104507

Type

Invention Patent

Filing

07/15/1980

Publication

03/30/1982
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Progress at the INPI

  1. Filing07/15/80
  2. Publication03/30/82
  3. Examination05/15/84
  4. Allowance05/17/88
  5. Grant11/29/88
  6. Terminated09/25/90

The patent was granted on 11/29/1988 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: 11/29/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

I. P. (pessoa física)

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Inventors

B. D. (pessoa física)

D. F. (pessoa física)

K. N. (pessoa física)

Q. V. (pessoa física)

Technical data

IPC Classification

C07C 7/10C08J 3/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/29/1988

RPI 945

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

09/29/1987

RPI 884

Exigência - art. 36 da LPI

#6.1

04/16/1985

RPI 756

Solicitação de exame técnico

#4.1

05/15/1984

RPI 708

Publicação do pedido de patente

#3.1

03/30/1982

RPI 597

Anuidade - prazo legal encerrado

#18.2

09/25/1990

RPI 1034

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