Official data from INPI

VELA DE IGNICAO

Em AnáliseInvention Patent

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Application data

Number

PI7904108

Type

Invention Patent

Filing

10/16/1978

Publication

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Progress at the INPI

Filing10/16/78
Publication
Examination
Allowance04/06/82
Grant
Expired04/04/95

The letters patent expired on 04/04/1995: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 08/23/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NGK SPARK PLUG CO

Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

18.8

08/23/1988

RPI 931

Anuidade - prazo legal encerrado

#18.2

05/17/1988

RPI 917

Notificação para pagamento de retribuição

#13.1

07/27/1982

RPI 614

Deferimento

#9.1

04/06/1982

RPI 598

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

From the same holder

DISPOSITIVO AUXILIAR DE PARTIDA DE MOTOR PARA USO EM UM MOTOR DE COMBUSTAO INTERNA DISPOSITIVO DE IGNICAO PIEZOELETRICO DISPOSITIVO DE IGNICAO PIEZELETRICO

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