(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

INSTALACAO E PROCESSO PARA A GASEIFICACAO DO CARVAO

ConcedidaInvention Patent

Application data

Number

PI7907720

Type

Invention Patent

Filing

11/29/1978

Publication

-

Progress at the INPI

  1. Filing11/29/78
  2. Publication
  3. Examination08/03/82
  4. Allowance01/15/85
  5. Grant07/30/85
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 07/30/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

RUHRKOHLE AG

Inventors

A. E. (pessoa física)

G. U. (pessoa física)

K. W. (pessoa física)

L. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/30/1985

RPI 771

Notificação para pagamento de retribuição

#13.1

05/07/1985

RPI 759

Deferimento

#9.1

01/15/1985

RPI 743

Exigência - art. 36 da LPI

#6.1

05/22/1984

RPI 709

Solicitação de exame técnico

#4.1

08/03/1982

RPI 615

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.