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Official data from INPI

FILTRO PARA AR COMPRIMIDO E OUTROS GASES

ConcedidaInvention Patent

Application data

Number

PI7901958

Type

Invention Patent

Filing

03/31/1978

Publication

-

Progress at the INPI

  1. Filing03/31/78
  2. Publication
  3. Examination12/01/81
  4. Allowance01/24/84
  5. Grant07/31/84
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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

K. D. (pessoa física)

Inventors

K. D. (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

05/17/1983

RPI 656

15.0

10/19/1982

RPI 626

Conhecimento de parecer técnico

#7.1

08/17/1982

RPI 617

Solicitação de exame técnico

#4.1

12/01/1981

RPI 580

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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