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Official data from INPI

APERFEICOAMENTO EM FILTRO DE AR;E PROCESSO PARA MONITORIZAR A CONDICAO DE UM FILTRO DE SEGURANCA EM UM FILTRO DE AR

Em AnáliseInvention Patent

Application data

Number

PI7603868

Type

Invention Patent

Filing

06/19/1975

Publication

-

Progress at the INPI

  1. Filing06/19/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant
  6. Terminated11/17/87

The patent was granted 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: 11/17/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DONALDSON CO INC

Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

11/17/1987

RPI 891

320

06/05/1984

RPI 711

201

10/18/1983

RPI 678

Pedido de licença voluntária

#17.1

06/14/1983

RPI 660

Notificação para pagamento de retribuição

#13.1

10/19/1982

RPI 626

110

08/10/1982

RPI 616

Recurso

#12.1

10/27/1981

RPI 575

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