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Official data from INPI

DISPOSITIVO INDICATOR DE GRAU DE OBSTRUÇÃO DE FILTRO DE AR

Em AnáliseInvention Patent

Application data

Number

PI8503512

Type

Invention Patent

Filing

07/24/1985

Publication

04/22/1986

Progress at the INPI

  1. Filing07/24/85
  2. Publication04/22/86
  3. Examination03/15/88
  4. Allowance10/22/91
  5. Grant08/25/92
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 03/15/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Filterwerk Mann & Hummel Gmbh

DE

See this company's full portfolio

Inventors

H. M. (pessoa física)

DE

P. G. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

DE

P 34 28307.2 · 08/01/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

03/15/1988

RPI 908

Publicação do pedido de patente

#3.1

04/22/1986

RPI 809

Pedido de patente depositado

#2.1

10/01/1985

RPI 780

Carta-patente expirada

#21.1

Patente extinta em 24/07/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

08/25/1992

RPI 1134

Republicação - classificação IPC

#15.11

03/17/1992

RPI 1111

Notificação para pagamento de retribuição

#13.1

03/03/1992

RPI 1109

Deferimento

#9.1

10/22/1991

RPI 1090

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