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Official data from INPI

DISPOSITIVO DE CONTROLE AUTOMÁTICO DO NÍVEL DE LÍQUIDOS

ConcedidaInvention Patent

Application data

Number

PI8403849

Type

Invention Patent

Filing

08/02/1984

Publication

03/11/1986

Progress at the INPI

  1. Filing08/02/84
  2. Publication03/11/86
  3. Examination04/26/88
  4. Allowance12/20/88
  5. Grant09/26/89
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Ramiro de Almeida Saraiva, português, comerciante

RJ, BR

Inventors

R. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

04/25/1989

RPI 966

Deferimento

#9.1

12/20/1988

RPI 948

Solicitação de exame técnico

#4.1

04/26/1988

RPI 914

Publicação do pedido de patente

#3.1

03/11/1986

RPI 803

Pedido de patente depositado

#2.1

10/09/1984

RPI 729

Carta-patente expirada

#21.1

Patente extinta em 02/08/99

07/08/2008

RPI 1957

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