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Official data from INPI

PROCESSO PARA GASIFICACAO DE COMBUSTIVEIS SOLIDOS,PARTICULARMENTE CARVAO,MEDIANTE OXIDACAO PARCIAL,E INSTALACAO PARA O MESMO

ConcedidaInvention Patent

Application data

Number

PI7800648

Type

Invention Patent

Filing

02/10/1977

Publication

-

Progress at the INPI

  1. Filing02/10/77
  2. Publication
  3. Examination
  4. Allowance03/08/83
  5. Grant08/30/83
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 08/30/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

RUHRCHEMIE AG

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Inventors

D. H. (pessoa física)

L. B. (pessoa física)

S. H. (pessoa física)

S. V. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/30/1983

RPI 671

Notificação para pagamento de retribuição

#13.1

06/28/1983

RPI 662

Deferimento

#9.1

03/08/1983

RPI 646

Exigência - art. 36 da LPI

#6.1

07/13/1982

RPI 612

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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