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Official data from INPI

UNIDADE DE FILTRAÇÃO DE GÁS

Em AnáliseInvention Patent

Application data

Number

PI8700842

Type

Invention Patent

Filing

02/23/1987

Publication

12/15/1987

Progress at the INPI

  1. Filing02/23/87
  2. Publication12/15/87
  3. Examination11/21/89
  4. Allowance02/26/91
  5. Grant09/24/91
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 11/21/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

G. M. (pessoa física)

MU

Inventors

G. M. (pessoa física)

MU

Technical data

IPC Classification

Priority claims

ZA

86/1365 · 02/24/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/21/1989

RPI 996

Publicação do pedido de patente

#3.1

12/15/1987

RPI 895

Pedido de patente depositado

#2.1

06/16/1987

RPI 869

Carta-patente expirada

#21.1

Patente extinta em 23/02/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

09/24/1991

RPI 1086

Notificação para pagamento de retribuição

#13.1

06/11/1991

RPI 1071

Deferimento

#9.1

02/26/1991

RPI 1056

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