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Official data from INPI

FILTRO BIOLOGICO IMERSO PARA PURIFICACAO DE AGUAS RESIDUAIS,E INSTALACAO QUE COMPORTA TAL FILTRO

ConcedidaInvention Patent

Application data

Number

PI7802899

Type

Invention Patent

Filing

05/10/1977

Publication

-

Progress at the INPI

  1. Filing05/10/77
  2. Publication
  3. Examination
  4. Allowance01/24/84
  5. Grant07/31/84
  6. Expired11/30/93

The letters patent expired on 11/30/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 07/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DEGREMONT

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Inventors

B. J. (pessoa física)

B. J. (pessoa física)

H. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/31/1984

RPI 719

Notificação para pagamento de retribuição

#13.1

05/02/1984

RPI 706

Deferimento

#9.1

01/24/1984

RPI 692

Exigência - art. 36 da LPI

#6.1

01/11/1983

RPI 638

6.2

01/19/1982

RPI 587

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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