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Official data from INPI

PROCESSO PARA FABRICAR UM DISPOSITIVO DE FILTRAÇÃO, E, DISPOSITIVO DE FILTRAÇÃO

PublicadaInvention Patent

Application data

Number

PI8804926

Type

Invention Patent

Filing

09/23/1988

Publication

05/02/1989

Progress at the INPI

  1. Filing09/23/88
  2. Publication05/02/89
  3. Examination06/11/91
  4. Allowance11/25/97
  5. Grant08/25/98
  6. Expired12/18/12

The letters patent expired on 12/18/2012: 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: 05/02/1989. 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

D. B. (pessoa física)

US

D. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

100,830 · 09/25/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

05/02/1989

RPI 967

Pedido de patente depositado

#2.1

02/08/1989

RPI 955

Carta-patente expirada

#21.1

Patente extinta em 23/09/2008

12/18/2012

RPI 2189

Concessão da patente

#16.1

08/25/1998

RPI 1444

Deferimento

#9.1

11/25/1997

RPI 1408

Exigência - art. 36 da LPI

#6.1

02/04/1997

RPI 1366

Republicação - classificação IPC

#15.11

11/05/1996

RPI 1353

6.2

03/19/1996

RPI 1320

Solicitação de exame técnico

#4.1

06/11/1991

RPI 1071

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