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Official data from INPI

ELEMENTO DE FILTRO E RESPIRADOR CONTENDO O MESMO

Prazo de SigiloInvention Patent

Application data

Number

PI8902282

Type

Invention Patent

Filing

05/16/1989

Publication

01/09/1990

Progress at the INPI

  1. Filing05/16/89
  2. Publication01/09/90
  3. Examination11/19/91
  4. Allowance05/20/97
  5. Grant01/21/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 07/04/1989. 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. J. (pessoa física)

US

G. B. (pessoa física)

US

S. Y. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

195,029 · 05/17/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

07/04/1989

RPI 976

Carta-patente expirada

#21.1

Patente extinta em 16/05/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

01/21/1998

RPI 1413

Deferimento

#9.1

05/20/1997

RPI 1381

Exigência - art. 36 da LPI

#6.1

06/11/1996

RPI 1332

Solicitação de exame técnico

#4.1

11/19/1991

RPI 1094

Publicação do pedido de patente

#3.1

01/09/1990

RPI 1001

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