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Official data from INPI

Processo para a depuração contínua de águas residuais com forte poluição orgânica e contendo sulfatos.

ConcedidaInvention Patent

Application data

Number

PI8004557

Type

Invention Patent

Filing

07/22/1980

Publication

-

Progress at the INPI

  1. Filing07/22/80
  2. Publication
  3. Examination03/08/83
  4. Allowance08/21/84
  5. Grant03/26/85
  6. Expired09/19/95

The letters patent expired on 09/19/1995: 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: 03/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Degremont

FR

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Inventors

D. A. (pessoa física)

N. R. (pessoa física)

Technical data

IPC Classification

Priority claims

FR

7918899 · 07/23/1979

FR

8013514 · 06/18/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/26/1985

RPI 753

Notificação para pagamento de retribuição

#13.1

12/11/1984

RPI 738

Deferimento

#9.1

08/21/1984

RPI 722

Exigência - art. 36 da LPI

#6.1

01/17/1984

RPI 691

Solicitação de exame técnico

#4.1

03/08/1983

RPI 646

Carta-patente expirada

#21.1

09/19/1995

RPI 1294

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