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Official data from INPI

APARELHO E PROCESSO PARA LEITURA DE INFORMACOES REGISTRADAS EM UMA PISTA DE INFORMACOES SOBRE UMA SUPERFICIE DE UM DISCO

Em AnáliseInvention Patent

Application data

Number

PI7900180

Type

Invention Patent

Filing

01/11/1979

Publication

-

Progress at the INPI

  1. Filing01/11/79
  2. Publication
  3. Examination10/13/82
  4. Allowance11/16/83
  5. Grant04/24/84
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 04/02/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

M. V. (pessoa física)

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Inventors

E. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

04/02/1985

RPI 754

20.4

03/05/1985

RPI 750

20.4

01/22/1985

RPI 744

Concessão da patente

#16.1

04/24/1984

RPI 705

Notificação para pagamento de retribuição

#13.1

03/20/1984

RPI 700

Deferimento

#9.1

11/16/1983

RPI 682

Exigência - art. 36 da LPI

#6.1

05/03/1983

RPI 654

Solicitação de exame técnico

#4.1

10/13/1982

RPI 625

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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