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Official data from INPI

ELEMENTO DE FILTRO DESCARTÁVEL E FILTRO

PublicadaInvention Patent

Application data

Number

PI8804428

Type

Invention Patent

Filing

08/30/1988

Publication

03/28/1989

Progress at the INPI

  1. Filing08/30/88
  2. Publication03/28/89
  3. Examination07/09/91
  4. Allowance12/26/95
  5. Grant11/26/96
  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: 03/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minnesota Mining and Manufacturing Company

US

See this company's full portfolio

Inventors

T. J. (pessoa física)

US

Technical data

Priority claims

US

095,440 · 08/31/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

03/28/1989

RPI 962

Pedido de patente depositado

#2.1

01/31/1989

RPI 954

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era B01D 29/06.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinta em 30/08/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

11/26/1996

RPI 1356

Notificação para pagamento de retribuição

#13.1

06/25/1996

RPI 1334

Deferimento

#9.1

12/26/1995

RPI 1308

Exigência - art. 36 da LPI

#6.1

05/02/1995

RPI 1274

Solicitação de exame técnico

#4.1

07/09/1991

RPI 1075

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