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Official data from INPI

UMECTADOR DE AR PARA DISPOSITIVOS DE RESPIRACAO

ConcedidaInvention Patent

Application data

Number

PI7702282

Type

Invention Patent

Filing

04/24/1976

Publication

-

Progress at the INPI

  1. Filing04/24/76
  2. Publication
  3. Examination
  4. Allowance04/27/82
  5. Grant11/30/82
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 11/30/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DRAEGERWERK AG

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Inventors

B. F. (pessoa física)

E. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/30/1982

RPI 632

Notificação para pagamento de retribuição

#13.1

08/31/1982

RPI 619

Deferimento

#9.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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