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Official data from INPI

SEM TITULO

ConcedidaInvention Patent
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Application data

Number

PI8103852

Type

Invention Patent

Filing

06/17/1981

Publication

03/09/1982
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Progress at the INPI

  1. Filing06/17/81
  2. Publication03/09/82
  3. Examination07/13/82
  4. Allowance03/07/84
  5. Grant09/25/84
  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: 09/25/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

M. I. (pessoa física)

US

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Inventors

M. A. (pessoa física)

Technical data

IPC Classification

F16K 11/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/25/1984

RPI 727

Notificação para pagamento de retribuição

#13.1

06/26/1984

RPI 714

Deferimento

#9.1

03/07/1984

RPI 698

Solicitação de exame técnico

#4.1

07/13/1982

RPI 612

Publicação do pedido de patente

#3.1

03/09/1982

RPI 594

Carta-patente expirada

#21.1

10/08/1996

RPI 1349

20.4

10/16/1990

RPI 1037

20.7

10/16/1990

RPI 1037

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