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Official data from INPI

PROCESSO PARA PRODUÇÃO CONTÍNUA DE PÓ DE SILÍCIO

Arquivada/ExtintaInvention Patent

Application data

Number

PI8906362

Type

Invention Patent

Filing

12/08/1989

Publication

08/21/1990

Progress at the INPI

  1. Filing12/08/89
  2. Publication08/21/90
  3. Examination02/13/91
  4. Allowance11/11/97
  5. Grant08/25/98
  6. Expired01/02/13

The letters patent expired on 01/02/2013: 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: 01/02/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Elkem a/s

NO

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Inventors

G. S. (pessoa física)

NO

K. F. (pessoa física)

NO

O. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

NO

885453 · 12/08/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 08/12/2009

01/02/2013

RPI 2191

Concessão da patente

#16.1

08/25/1998

RPI 1444

Deferimento

#9.1

11/11/1997

RPI 1406

Exigência - art. 36 da LPI

#6.1

11/07/1995

RPI 1301

Solicitação de exame técnico

#4.1

02/13/1991

RPI 1054

Publicação do pedido de patente

#3.1

08/21/1990

RPI 1029

Pedido de patente depositado

#2.1

04/03/1990

RPI 1012

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