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Official data from INPI

PRODUTO DE FILTRAÇÃO FIBROSO MOLDADO, E, PROCESSO PARA SUA PREPARAÇÃO

Em AnáliseInvention Patent

Application data

Number

PI8501322

Type

Invention Patent

Filing

03/25/1985

Publication

11/19/1985

Progress at the INPI

  1. Filing03/25/85
  2. Publication11/19/85
  3. Examination10/20/87
  4. Allowance10/23/90
  5. Grant05/28/91
  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: 10/20/1987. 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

H. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

593.937 · 03/27/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/20/1987

RPI 887

Publicação do pedido de patente

#3.1

11/19/1985

RPI 787

Pedido de patente depositado

#2.1

06/11/1985

RPI 764

Carta-patente expirada

#21.1

Patente extinta em 25/03/2000

07/15/2008

RPI 1958

Republicação - classificação IPC

#15.11

05/28/1991

RPI 1069

Concessão da patente

#16.1

05/28/1991

RPI 1069

Notificação para pagamento de retribuição

#13.1

02/05/1991

RPI 1053

Deferimento

#9.1

10/23/1990

RPI 1038

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