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Official data from INPI

CARTUCHO FILTRANTE

PublicadaInvention Patent

Application data

Number

PI8804189

Type

Invention Patent

Filing

08/18/1988

Publication

03/14/1989

Progress at the INPI

  1. Filing08/18/88
  2. Publication03/14/89
  3. Examination04/02/91
  4. Allowance09/26/95
  5. Grant04/30/96
  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: 03/14/1989. 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

Y. T. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

087,204 · 08/20/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

03/14/1989

RPI 960

Pedido de patente depositado

#2.1

01/10/1989

RPI 951

Carta-patente expirada

#21.1

Patente extinta em 18/08/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

04/30/1996

RPI 1326

Deferimento

#9.1

09/26/1995

RPI 1295

Exigência - art. 36 da LPI

#6.1

05/02/1995

RPI 1274

Solicitação de exame técnico

#4.1

04/02/1991

RPI 1061

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