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Official data from INPI

REGISTRADOR INDICADOR

Em AnáliseInvention Patent

Application data

Number

PI7800552

Type

Invention Patent

Filing

11/14/1977

Publication

-

Progress at the INPI

  1. Filing11/14/77
  2. Publication
  3. Examination
  4. Allowance11/03/81
  5. Grant02/28/84
  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.

Talk to a specialist

Latest action published by the INPI: 01/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

YOKOGAWA ELECTRIC WORKS LTD

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Inventors

A. H. (pessoa física)

F. H. (pessoa física)

S. S. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

01/19/1988

RPI 900

Concessão da patente

#16.1

02/28/1984

RPI 697

14.4

11/01/1983

RPI 680

Notificação para pagamento de retribuição

#13.1

07/05/1983

RPI 663

11.8

06/28/1983

RPI 662

11.8

06/07/1983

RPI 659

Arquivamento - Art. 38 §2° da LPI

#11.4

12/28/1982

RPI 636

Deferimento

#9.1

11/03/1981

RPI 576

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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