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Official data from INPI

CIRCUITO DE SIGILO TELEFÔNICO.

Em AnáliseInvention Patent

Application data

Number

PI8500278

Type

Invention Patent

Filing

01/22/1985

Publication

09/02/1986

Progress at the INPI

  1. Filing01/22/85
  2. Publication09/02/86
  3. Examination11/04/86
  4. Allowance02/06/90
  5. Grant02/13/91
  6. Terminated05/21/96

The patent was granted on 02/13/1991 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 11/04/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alta Tecnologia Indústria Eletrônica Ltda.

RJ, BR

Inventors

D. B. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/04/1986

RPI 837

Publicação do pedido de patente

#3.1

09/02/1986

RPI 828

Pedido de patente depositado

#2.1

04/23/1985

RPI 757

Anuidade - prazo legal encerrado

#18.2

05/21/1996

RPI 1329

Concessão da patente

#16.1

02/13/1991

RPI 1054

110

11/13/1990

RPI 1041

Recurso

#12.1

04/10/1990

RPI 1013

Deferimento

#9.1

02/06/1990

RPI 1005

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