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Official data from INPI

PROCESSO PARA LIQUETAÇÃO DE CARVÃO E MATERIAIS CARBONÁCEOS SÓLIDOS SIMILARES E PRODUTO OBTIDO PELO DITO PROCESSO.

ConcedidaInvention Patent

Application data

Number

PI8100471

Type

Invention Patent

Filing

01/28/1981

Publication

08/17/1982

Progress at the INPI

  1. Filing01/28/81
  2. Publication08/17/82
  3. Examination10/09/84
  4. Allowance07/08/86
  5. Grant02/03/87
  6. Terminated08/23/94

The patent was granted on 02/03/1987 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/03/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Research And Engineering Company

US

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Inventors

A. G. (pessoa física)

B. R. (pessoa física)

H. S. (pessoa física)

T. J. (pessoa física)

T. K. (pessoa física)

Technical data

IPC Classification

Priority claims

US

203.410 · 11/03/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/03/1987

RPI 850

Notificação para pagamento de retribuição

#13.1

11/04/1986

RPI 837

Deferimento

#9.1

07/08/1986

RPI 820

Exigência - art. 36 da LPI

#6.1

06/18/1985

RPI 765

Solicitação de exame técnico

#4.1

10/09/1984

RPI 729

Publicação do pedido de patente

#3.1

08/17/1982

RPI 617

Anuidade - prazo legal encerrado

#18.2

08/23/1994

RPI 1238

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