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Official data from INPI

PROCESSO E DISPOSITIVO PARA EVACUAR PERIODICAMENTE,MEDIANTE UMA ECLUSA,OS RESIDUOS QUE OCORREM NA GASEIFICACAO DE COMBUSTIVEL SOLIDOS CONTENDO CINZAS

ConcedidaInvention Patent

Application data

Number

PI7904201

Type

Invention Patent

Filing

07/06/1978

Publication

-

Progress at the INPI

  1. Filing07/06/78
  2. Publication
  3. Examination
  4. Allowance03/08/83
  5. Grant08/30/83
  6. Expired04/18/95

The letters patent expired on 04/18/1995: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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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

6.2

04/06/1982

RPI 598

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

Pedido de licença compulsória

#20.1

02/09/1993

RPI 1158

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