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Official data from INPI

INSTALACAO DE TRANSMISSAO DE CONTROLE INDIRETO,COM CAMINHOS DE LIGACAO DE CANAIS TEMPORAIS,ESPECIALMENTE INSTALACAO DE TRANSMISSAO TELEFONICA

Concessão AnuladaInvention Patent

Application data

Number

PI7903752

Type

Invention Patent

Filing

06/14/1978

Publication

-

Progress at the INPI

  1. Filing06/14/78
  2. Publication
  3. Examination03/16/82
  4. Allowance07/05/83
  5. Grant12/27/83
  6. Expired04/04/95

The letters patent expired on 04/04/1995: 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: 03/20/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SIEMENS AG

See this company's full portfolio

Inventors

B. D. (pessoa física)

B. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

03/20/1984

RPI 700

Concessão da patente

#16.1

12/27/1983

RPI 688

Deferimento

#9.1

07/05/1983

RPI 663

Republicação - classificação IPC

#15.11

11/23/1982

RPI 631

Exigência - art. 36 da LPI

#6.1

10/19/1982

RPI 626

Solicitação de exame técnico

#4.1

03/16/1982

RPI 595

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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