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

CIRCUITO FOTO-TRANSDUTOR E PROCESSO PARA PRODUÇÃO DE UM SINAL DE CORRENTE PROPORCIONAL A UM PARÂMETRO DE ENTRADA.

ConcedidaInvention Patent

Application data

Number

PI8400019

Type

Invention Patent

Filing

01/04/1984

Publication

08/14/1984

Progress at the INPI

  1. Filing01/04/84
  2. Publication08/14/84
  3. Examination09/30/86
  4. Allowance09/13/88
  5. Grant07/25/89
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Dresser Industries, Inc

US

See this company's full portfolio

Inventors

B. B. (pessoa física)

Technical data

IPC Classification

Priority claims

US

455.679 · 01/05/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/25/1989

RPI 979

Notificação para pagamento de retribuição

#13.1

01/03/1989

RPI 950

Deferimento

#9.1

09/13/1988

RPI 934

6.2

09/08/1987

RPI 881

Solicitação de exame técnico

#4.1

09/30/1986

RPI 832

Publicação do pedido de patente

#3.1

08/14/1984

RPI 721

Pedido de patente depositado

#2.1

03/20/1984

RPI 700

Carta-patente expirada

#21.1

Patente extinta em 04/01/99

07/08/2008

RPI 1957

Cessão de direito de exploração

#22.1

09/01/1992

RPI 1135

Related

Same category

Patent monitoring

Track this patent in real time.

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