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Official data from INPI

VALVULA DE DOIS ASSENTOS

ConcedidaInvention Patent

Application data

Number

PI7905498

Type

Invention Patent

Filing

08/26/1978

Publication

-

Progress at the INPI

  1. Filing08/26/78
  2. Publication
  3. Examination
  4. Allowance10/13/82
  5. Grant06/28/83
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 06/28/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HOLSTEIN & KAPPERT GMBH

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Inventors

S. H. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/28/1983

RPI 662

Notificação para pagamento de retribuição

#13.1

02/16/1983

RPI 643

Deferimento

#9.1

10/13/1982

RPI 625

Exigência - art. 36 da LPI

#6.1

03/09/1982

RPI 594

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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