(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

PROCESSO PARA ISOLAR ELETRICAMENTE UMA UNIDADE PORTADORA DE PRESSÃO E GERADOR DE ALTA VOLTAGEM

Em AnáliseInvention Patent

Application data

Number

PI8704270

Type

Invention Patent

Filing

08/19/1987

Publication

04/12/1988

Progress at the INPI

  1. Filing08/19/87
  2. Publication04/12/88
  3. Examination11/08/88
  4. Allowance04/05/94
  5. Grant11/29/94
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 11/08/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NGK Spark Plug Co. Ltd

JP

See this company's full portfolio

Inventors

N. H. (pessoa física)

JP

Technical data

IPC Classification

Priority claims

JP

194786/86 · 08/20/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/08/1988

RPI 942

Publicação do pedido de patente

#3.1

04/12/1988

RPI 912

Pedido de patente depositado

#2.1

11/10/1987

RPI 890

Carta-patente expirada

#21.1

Patente extinta em 19/08/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

11/29/1994

RPI 1252

Notificação para pagamento de retribuição

#13.1

08/02/1994

RPI 1235

Deferimento

#9.1

04/05/1994

RPI 1218

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.