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Official data from INPI

CONTROLE DE CENTRAIS TELEFONICAS

Em AnáliseInvention Patent

Application data

Number

PI7900621

Type

Invention Patent

Filing

01/31/1979

Publication

-

Progress at the INPI

  1. Filing01/31/79
  2. Publication
  3. Examination
  4. Allowance04/19/83
  5. Grant11/29/83
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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: 08/13/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

B. T. (pessoa física)

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Inventors

H. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

320

08/13/1985

RPI 773

300

04/30/1985

RPI 758

201

01/08/1985

RPI 742

Pedido de licença voluntária

#17.1

05/22/1984

RPI 709

Concessão da patente

#16.1

11/29/1983

RPI 684

Notificação para pagamento de retribuição

#13.1

09/06/1983

RPI 672

Deferimento

#9.1

04/19/1983

RPI 652

Exigência - art. 36 da LPI

#6.1

08/17/1982

RPI 617

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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