Official data from INPI

PROCESSO PARA LIQUEFACAO DE CARVAO

ConcedidaInvention Patent

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Application data

Number

PI7801321

Type

Invention Patent

Filing

03/04/1977

Publication

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Progress at the INPI

Filing03/04/77
Publication
Examination
Allowance08/17/82
Grant05/31/83
Terminated06/29/93

The patent was granted on 05/31/1983 and later terminated. Protection ended before the full term and the technology is in the public domain in Brazil.

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Latest action published by the INPI: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

S. K. (pessoa física)

Inventors

S. K. (pessoa física)

Technical data

IPC Classification

C10L 1/32

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1983

RPI 658

Notificação para pagamento de retribuição

#13.1

12/28/1982

RPI 636

15.0

08/31/1982

RPI 619

Deferimento

#9.1

08/17/1982

RPI 617

21.5

07/06/1993

RPI 1179

Carta-patente expirada

#21.1

06/29/1993

RPI 1178

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