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Official data from INPI

PROCESSO PARA O TRATAMENTO CATALÍTICO DE GÁS BRUTO OBTIDO POR OXIDAÇÃO PARCIAL

ConcedidaInvention Patent

Application data

Number

PI8105532

Type

Invention Patent

Filing

08/31/1981

Publication

04/05/1983

Progress at the INPI

  1. Filing08/31/81
  2. Publication04/05/83
  3. Examination03/12/85
  4. Allowance03/31/87
  5. Grant09/29/87
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 09/29/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

KRUPP-KOPPERS GMBH

DE

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Inventors

D. F. (pessoa física)

DE

D. Z. (pessoa física)

DE

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/29/1987

RPI 884

Deferimento

#9.1

03/31/1987

RPI 858

Republicação - classificação IPC

#15.11

01/14/1986

RPI 795

Exigência - art. 36 da LPI

#6.1

10/22/1985

RPI 783

Solicitação de exame técnico

#4.1

03/12/1985

RPI 751

Publicação do pedido de patente

#3.1

04/05/1983

RPI 650

Pedido de patente depositado

#2.1

10/13/1981

RPI 573

Carta-patente expirada

#21.1

Patente extinta em 31/08/96

08/19/2008

RPI 1963

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