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Official data from INPI

INDUTOR VARIÁVEL E SISTEMA ELÉTRICO

Em AnáliseInvention Patent

Application data

Number

PI8506473

Type

Invention Patent

Filing

12/23/1985

Publication

09/02/1986

Progress at the INPI

  1. Filing12/23/85
  2. Publication09/02/86
  3. Examination03/31/87
  4. Allowance01/02/91
  5. Grant09/24/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 03/31/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

General Electric Company

US

Hydro-Quebec

CA

See this company's full portfolio

Inventors

L. B. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

CA

472.204 · 01/16/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

03/31/1987

RPI 858

Publicação do pedido de patente

#3.1

09/02/1986

RPI 828

Pedido de patente depositado

#2.1

03/18/1986

RPI 804

Carta-patente expirada

#21.1

Patente extinta em 23/12/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

09/24/1991

RPI 1086

Notificação para pagamento de retribuição

#13.1

04/16/1991

RPI 1063

Deferimento

#9.1

01/02/1991

RPI 1048

6.2

01/02/1990

RPI 1000

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