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Official data from INPI

PROCESSO DE PROTEGER OS TIRISTORES DE UM CIRCUITO GERADOR DE PULSOS E CIRCUITO PROTETOR DE DISPARO.

Em AnáliseInvention Patent

Application data

Number

PI8603938

Type

Invention Patent

Filing

08/18/1986

Publication

03/24/1987

Progress at the INPI

  1. Filing08/18/86
  2. Publication03/24/87
  3. Examination07/07/87
  4. Allowance09/01/92
  5. Grant04/27/93
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 07/07/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

F. L. Smidth Comércio e Industria Ltda

SP, BR

See this company's full portfolio

Inventors

C. T. (pessoa física)

DK

Technical data

IPC Classification

Priority claims

DK

3747/85 · 08/19/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

07/07/1987

RPI 872

Publicação do pedido de patente

#3.1

03/24/1987

RPI 857

Pedido de patente depositado

#2.1

03/04/1987

RPI 854

Carta-patente expirada

#21.1

Patente extinta em 18/08/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

04/27/1993

RPI 1169

Notificação para pagamento de retribuição

#13.1

01/26/1993

RPI 1156

Deferimento

#9.1

09/01/1992

RPI 1135

Exigência - art. 36 da LPI

#6.1

11/26/1991

RPI 1095

14.4

06/11/1991

RPI 1071

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