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Official data from INPI

PROCESSO PARA QUEIMA PARCIAL DE CARVÃO PULVERIZADO E REATOR DE GASEIFICAÇÃO

ConcedidaInvention Patent

Application data

Number

PI7706310

Type

Invention Patent

Filing

09/21/1977

Publication

-

Progress at the INPI

  1. Filing09/21/77
  2. Publication
  3. Examination
  4. Allowance11/08/83
  5. Grant06/24/86
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 06/24/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

See this company's full portfolio

Inventors

G. S. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

NL

7610560 · 09/23/1976

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/24/1986

RPI 818

110

02/18/1986

RPI 800

14.1

12/18/1984

RPI 739

Recurso

#12.1

02/14/1984

RPI 695

Deferimento

#9.1

11/08/1983

RPI 681

Exigência - art. 36 da LPI

#6.1

10/19/1982

RPI 626

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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