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Official data from INPI

VÁLVULA AUTO BLOCANTE PARA GÁS.

ConcedidaInvention Patent

Application data

Number

PI8103771

Type

Invention Patent

Filing

06/15/1981

Publication

01/18/1983

Progress at the INPI

  1. Filing06/15/81
  2. Publication01/18/83
  3. Examination04/05/83
  4. Allowance05/22/84
  5. Grant12/26/84
  6. Expired10/08/96

The letters patent expired on 10/08/1996: 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: 12/26/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Imar Indústria Metalúrgica Ltda

SP, BR

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Inventors

H. F. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/26/1984

RPI 740

Notificação para pagamento de retribuição

#13.1

09/04/1984

RPI 724

Deferimento

#9.1

05/22/1984

RPI 709

Solicitação de exame técnico

#4.1

04/05/1983

RPI 650

Publicação do pedido de patente

#3.1

01/18/1983

RPI 639

Carta-patente expirada

#21.1

10/08/1996

RPI 1349

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