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Official data from INPI

VALVULA DE REPERCUSSAO

ConcedidaInvention Patent

Application data

Number

PI7900299

Type

Invention Patent

Filing

01/28/1978

Publication

-

Progress at the INPI

  1. Filing01/28/78
  2. Publication
  3. Examination
  4. Allowance05/10/83
  5. Grant11/29/83
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 11/29/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

F. C. (pessoa física)

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Inventors

S. W. (pessoa física)

T. T. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/29/1983

RPI 684

Notificação para pagamento de retribuição

#13.1

09/27/1983

RPI 675

Deferimento

#9.1

05/10/1983

RPI 655

Exigência - art. 36 da LPI

#6.1

11/16/1982

RPI 630

6.2

02/02/1982

RPI 589

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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