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Official data from INPI

TRANSMISSOR DE PRESSAO DIFERENCIAL TIPO CAPACITOR

Em AnáliseInvention Patent

Application data

Number

PI7903539

Type

Invention Patent

Filing

06/05/1979

Publication

-

Progress at the INPI

  1. Filing06/05/79
  2. Publication
  3. Examination
  4. Allowance07/27/82
  5. Grant03/29/83
  6. Expired04/04/95

The letters patent expired on 04/04/1995: 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: 02/09/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

YOKOGAWA ELECTRIC WORKS LTD

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Inventors

S. G. (pessoa física)

S. K. (pessoa física)

T. S. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

02/09/1988

RPI 903

20.4

11/01/1983

RPI 680

Concessão da patente

#16.1

03/29/1983

RPI 649

Notificação para pagamento de retribuição

#13.1

12/14/1982

RPI 634

Deferimento

#9.1

07/27/1982

RPI 614

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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