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Official data from INPI

APERFEIÇOAMETO EM SISTEMA DE SINALIZAÇÃO TELEFÔNICA

Em ExigênciaInvention Patent
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Application data

Number

PI8401118

Type

Invention Patent

Filing

03/12/1984

Publication

10/15/1985
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Progress at the INPI

  1. Filing03/12/84
  2. Publication10/15/85
  3. Examination09/01/87
  4. Allowance08/21/90
  5. Grant10/29/91
  6. Terminated06/06/95

The patent was granted on 10/29/1991 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 10/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A - USIMINAS

MG, BR

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Inventors

E. A. (pessoa física)

BR

Technical data

IPC Classification

H04Q 1/30

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

10/24/1989

RPI 992

Solicitação de exame técnico

#4.1

09/01/1987

RPI 880

Publicação do pedido de patente

#3.1

10/15/1985

RPI 782

Pedido de patente depositado

#2.1

05/29/1984

RPI 710

Anuidade - prazo legal encerrado

#18.2

06/06/1995

RPI 1279

Concessão da patente

#16.1

10/29/1991

RPI 1091

Notificação para pagamento de retribuição

#13.1

06/11/1991

RPI 1071

15.5

01/02/1991

RPI 1048

Deferimento

#9.1

08/21/1990

RPI 1029

Exigência - art. 36 da LPI

#6.1

03/20/1990

RPI 1010

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