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Official data from INPI

ELEMENTO DE CONTATO

ConcedidaInvention Patent

Application data

Number

PI7802821

Type

Invention Patent

Filing

05/06/1977

Publication

-

Progress at the INPI

  1. Filing05/06/77
  2. Publication
  3. Examination
  4. Allowance11/03/81
  5. Grant11/30/82
  6. Expired11/30/93

The letters patent expired on 11/30/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 11/30/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ERICSSON TELEFON AB L M

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Inventors

J. L. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/30/1982

RPI 632

Deferimento

#9.1

11/03/1981

RPI 576

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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