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Official data from INPI

DISPOSITIVO IMPEDITIVO DE FORMACAO DE VACUO NAS VALVULAS DE DESCARGA

Em AnáliseInvention Patent

Application data

Number

PI7705384

Type

Invention Patent

Filing

08/15/1977

Publication

-

Progress at the INPI

  1. Filing08/15/77
  2. Publication
  3. Examination
  4. Allowance11/17/81
  5. Grant08/31/82
  6. Expired07/06/93

The letters patent expired on 07/06/1993: 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: 08/23/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

E. P. (pessoa física)

Inventors

E. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

08/23/1983

RPI 670

Concessão da patente

#16.1

08/31/1982

RPI 619

Notificação para pagamento de retribuição

#13.1

03/23/1982

RPI 596

Deferimento

#9.1

11/17/1981

RPI 578

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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