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Official data from INPI

Conversor pneumático.

Em AnáliseInvention Patent
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Application data

Number

PI7907046

Type

Invention Patent

Filing

10/30/1979

Publication

-
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Progress at the INPI

  1. Filing10/30/79
  2. Publication
  3. Examination
  4. Allowance05/04/82
  5. Grant
  6. Expired05/02/95

The letters patent expired on 05/02/1995: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 02/09/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Yokogawa Eletric Works, Ltd.

Inventors

No inventors listed.

Technical data

IPC Classification

No 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

Notificação para pagamento de retribuição

#13.1

09/08/1982

RPI 620

Deferimento

#9.1

05/04/1982

RPI 602

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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