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Official data from INPI

PROCESSO PARA SEPARAÇÃO DE PARTÍCULAS DE PORTADORES DE BENTONITA E CARBONO DO PÓ OBTIDO POR VIA MECÂNICA QUANDO DA REGENERAÇÃO DE AREIA VELHA

Arquivada/ExtintaInvention Patent

Application data

Number

PI9104445

Type

Invention Patent

Filing

10/14/1991

Publication

06/23/1992

Progress at the INPI

  1. Filing10/14/91
  2. Publication06/23/92
  3. Examination10/06/92
  4. Allowance03/14/95
  5. Grant12/26/95
  6. Expired06/29/10

The letters patent expired on 06/29/2010: 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: 06/29/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Georg Fischer Ag

CH

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Inventors

L. W. (pessoa física)

DE

P. R. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

CH

03 723/90-7 · 11/23/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 14/10/2006

06/29/2010

RPI 2060

Concessão da patente

#16.1

12/26/1995

RPI 1308

Notificação para pagamento de retribuição

#13.1

08/29/1995

RPI 1291

Deferimento

#9.1

03/14/1995

RPI 1267

Solicitação de exame técnico

#4.1

10/06/1992

RPI 1140

Publicação do pedido de patente

#3.1

06/23/1992

RPI 1125

Pedido de patente depositado

#2.1

11/19/1991

RPI 1094

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