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Official data from INPI

CIRCUITO DE CONTROLE DE REALIMENTAÇÃO DE CAPICITÂNCIA COMUTADA E MODULADOR SIGMA-DELTA USANDO O MESMO

Em ExigênciaInvention Patent

Application data

Number

PI8501066

Type

Invention Patent

Filing

03/11/1985

Publication

10/29/1985

Progress at the INPI

  1. Filing03/11/85
  2. Publication10/29/85
  3. Examination11/25/86
  4. Allowance04/23/91
  5. Grant10/29/91
  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: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alcatel N.V.

NL

See this company's full portfolio

Inventors

D. R. (pessoa física)

BE

Technical data

IPC Classification

Priority claims

BE

899174 · 03/16/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

05/30/1989

RPI 971

14.1

11/17/1987

RPI 891

Solicitação de exame técnico

#4.1

11/25/1986

RPI 840

Publicação do pedido de patente

#3.1

10/29/1985

RPI 784

Pedido de patente depositado

#2.1

06/04/1985

RPI 763

Carta-patente expirada

#21.1

Patente extinta em 11/03/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

10/29/1991

RPI 1091

Notificação para pagamento de retribuição

#13.1

08/06/1991

RPI 1079

Deferimento

#9.1

04/23/1991

RPI 1064

Exigência - art. 36 da LPI

#6.1

01/15/1991

RPI 1050

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