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Official data from INPI

COMUTADOR DE PRESSAO

Em AnáliseInvention Patent

Application data

Number

PI7707941

Type

Invention Patent

Filing

12/03/1976

Publication

-

Progress at the INPI

  1. Filing12/03/76
  2. Publication
  3. Examination
  4. Allowance02/24/82
  5. Grant
  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: 11/08/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

GAMBRO AB

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Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.11

11/08/1983

RPI 681

20.4

08/23/1983

RPI 670

Notificação para pagamento de retribuição

#13.1

06/08/1982

RPI 607

Deferimento

#9.1

02/24/1982

RPI 592

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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