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Official data from INPI

COMPOSIÇÃO COMBUSTÍVEL ALTERNATIVA PARA USO EM FORNOS INDUSTRIAIS 3

Prazo de SigiloInvention Patent

Application data

Number

PI8803706

Type

Invention Patent

Filing

07/26/1988

Publication

03/06/1990

Progress at the INPI

  1. Filing07/26/88
  2. Publication03/06/90
  3. Examination04/23/91
  4. Allowance03/12/96
  5. Grant10/29/96
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A-Usiminas

MG, BR

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Inventors

R. S. (pessoa física)

BR

Y. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

07/25/1989

RPI 979

Carta-patente expirada

#21.1

Patente extinta em 26/07/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

10/29/1996

RPI 1352

Deferimento

#9.1

03/12/1996

RPI 1319

Exigência - art. 36 da LPI

#6.1

01/31/1995

RPI 1261

Solicitação de exame técnico

#4.1

04/23/1991

RPI 1064

Publicação do pedido de patente

#3.1

03/06/1990

RPI 1008

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