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Official data from INPI

DISPOSITIVO DE COMUNICAÇÃO PARA LINHAS PRIVATIVAS A DOIS OU QUATRO FIOS COM SINALIZAÇÃO NA FAIXA DE VOZ

Prazo de SigiloInvention Patent

Application data

Number

PI8903023

Type

Invention Patent

Filing

06/09/1989

Publication

12/26/1990

Progress at the INPI

  1. Filing06/09/89
  2. Publication12/26/90
  3. Abandoned11/19/91
  4. Allowance
  5. Grant
  6. In force

The application was abandoned at the INPI. The case ended without a patent and the technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 08/01/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Telecomunicações de São Paulo S/A - TELESP

SP, BR

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Inventors

M. G. (pessoa física)

BR

N. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

08/01/1989

RPI 980

11.3

11/29/1994

RPI 1252

Exigência - art. 36 da LPI

#6.1

03/15/1994

RPI 1215

Solicitação de exame técnico

#4.1

11/19/1991

RPI 1094

Publicação do pedido de patente

#3.1

12/26/1990

RPI 1047

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