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Official data from INPI

MÓDULO FILTRANTE DE PARTICULADOS

Arquivada/ExtintaInvention PatentPCT · US1988002763

Application data

Number

PI8807689

Type

Invention Patent

Filing

08/10/1988

Publication

06/26/1990

PCT

US1988002763

Progress at the INPI

  1. Filing08/10/88
  2. Publication06/26/90
  3. Examination07/16/91
  4. Allowance03/09/93
  5. Grant08/31/93
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 09/02/2008. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Donaldson Company, Inc

US

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Inventors

B. H. (pessoa física)

D. F. (pessoa física)

E. S. (pessoa física)

W. W. (pessoa física)

Technical data

IPC Classification

Priority claims

US

088.055 · 08/21/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 10/08/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

08/31/1993

RPI 1187

Notificação para pagamento de retribuição

#13.1

06/29/1993

RPI 1178

Deferimento

#9.1

03/09/1993

RPI 1162

Solicitação de exame técnico

#4.1

07/16/1991

RPI 1076

Notificação de entrada na fase nacional - PCT

#1.3

06/26/1990

RPI 1024

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