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Official data from INPI

PROCESSO PARA GASEIFICAR CARVAO E GAS COMBUSTIVEL ASSIM OBTIDO

Em AnáliseInvention Patent

Application data

Number

PI7808431

Type

Invention Patent

Filing

12/19/1977

Publication

-

Progress at the INPI

  1. Filing12/19/77
  2. Publication
  3. Examination
  4. Allowance11/08/83
  5. Grant04/24/84
  6. Terminated06/14/88

The patent was granted on 04/24/1984 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: 06/14/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

EXXON RESEARCH ENGINEERING CO

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Inventors

L. R. (pessoa física)

N. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

06/14/1988

RPI 921

Concessão da patente

#16.1

04/24/1984

RPI 705

Notificação para pagamento de retribuição

#13.1

02/28/1984

RPI 697

Deferimento

#9.1

11/08/1983

RPI 681

Exigência - art. 36 da LPI

#6.1

03/15/1983

RPI 647

6.2

06/22/1982

RPI 609

Pedido de certificado de adição de invenção

#5.1

03/30/1982

RPI 597

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