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Official data from INPI

CIRCUITOS E METODOS PARA CONTROLE MULTIPLO EM SISTEMAS DE PROCESSAMENTO DE DADOS

ConcedidaInvention Patent

Application data

Number

PI7902170

Type

Invention Patent

Filing

04/10/1978

Publication

-

Progress at the INPI

  1. Filing04/10/78
  2. Publication
  3. Examination12/22/81
  4. Allowance08/16/83
  5. Grant01/31/84
  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: 01/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

IBM

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Inventors

L. F. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

01/31/1984

RPI 693

Notificação para pagamento de retribuição

#13.1

12/06/1983

RPI 685

Deferimento

#9.1

08/16/1983

RPI 669

Solicitação de exame técnico

#4.1

12/22/1981

RPI 583

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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