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Official data from INPI

DISPOSITIVO DE FILTRAGEM

ConcedidaInvention Patent

Application data

Number

PI8007540

Type

Invention Patent

Filing

11/19/1980

Publication

-

Progress at the INPI

  1. Filing11/19/80
  2. Publication
  3. Examination12/21/82
  4. Allowance06/26/84
  5. Grant03/26/85
  6. Expired12/26/95

The letters patent expired on 12/26/1995: 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

W. S. (pessoa física)

DE

Inventors

S. W. (pessoa física)

Technical data

IPC Classification

Priority claims

DE

P 29 47 329.8 · 11/23/1979

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

10/23/1984

RPI 731

Deferimento

#9.1

06/26/1984

RPI 714

Exigência - art. 36 da LPI

#6.1

01/17/1984

RPI 691

Solicitação de exame técnico

#4.1

12/21/1982

RPI 635

Carta-patente expirada

#21.1

12/26/1995

RPI 1308

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