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Official data from INPI

DETETOR DE FORCA

Em AnáliseInvention Patent

Application data

Number

PI7803466

Type

Invention Patent

Filing

05/30/1977

Publication

-

Progress at the INPI

  1. Filing05/30/77
  2. Publication
  3. Examination
  4. Allowance
  5. Grant07/27/82
  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.

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. T. (pessoa física)

A. T. (pessoa física)

I. I. (pessoa física)

S. T. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

01/19/1988

RPI 900

20.4

08/07/1984

RPI 720

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

01/26/1982

RPI 588

15.0

11/03/1981

RPI 576

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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