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Official data from INPI

SISTEMA E PROCESSO DE POSICIONAMENTO PRECISO DE UM DISPOSITIVO DE CABECOTE MAGNETICO EM RELACAO A UMA REFERENCIA DE TRILHA SOBRE UM CORPO DE DISCO

ConcedidaInvention Patent

Application data

Number

PI7707912

Type

Invention Patent

Filing

12/09/1976

Publication

-

Progress at the INPI

  1. Filing12/09/76
  2. Publication
  3. Examination
  4. Allowance08/03/82
  5. Grant05/31/83
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BURROUGHS CORP

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Inventors

A. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1983

RPI 658

Notificação para pagamento de retribuição

#13.1

12/14/1982

RPI 634

Deferimento

#9.1

08/03/1982

RPI 615

Exigência - art. 36 da LPI

#6.1

03/16/1982

RPI 595

6.2

11/10/1981

RPI 577

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

Pedido de licença compulsória

#20.1

10/20/1992

RPI 1142

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