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Official data from INPI

PROCESSO PARA A ALIMENTACAO DE CARVAO EM UMA INSTALACAO DE GASEIFICACAO DE CARVAO

ConcedidaInvention Patent

Application data

Number

PI7904150

Type

Invention Patent

Filing

06/29/1978

Publication

-

Progress at the INPI

  1. Filing06/29/78
  2. Publication
  3. Examination04/27/82
  4. Allowance09/15/87
  5. Grant02/23/88
  6. Expired04/04/95

The letters patent expired on 04/04/1995: 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: 02/23/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

RUHRKOHLE AG

Inventors

S. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/23/1988

RPI 905

Deferimento

#9.1

09/15/1987

RPI 882

Exigência - art. 36 da LPI

#6.1

03/07/1984

RPI 698

Republicação - classificação IPC

#15.11

05/10/1983

RPI 655

Exigência - art. 36 da LPI

#6.1

03/22/1983

RPI 648

Solicitação de exame técnico

#4.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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