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Official data from INPI

DENSIMETRO PARA MEDIÇÃO EM LINHA

PublicadaInvention Patent

Application data

Number

PI8604870

Type

Invention Patent

Filing

10/07/1986

Publication

05/31/1988

Progress at the INPI

  1. Filing10/07/86
  2. Publication05/31/88
  3. Examination05/01/90
  4. Allowance11/26/91
  5. Grant10/27/92
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Petróleo Brasileiro S/A - Petrobrás

RJ, BR

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Inventors

C. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

05/31/1988

RPI 919

Pedido de patente depositado

#2.1

04/07/1987

RPI 859

Carta-patente expirada

#21.1

Patente extinta em 07/10/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

10/27/1992

RPI 1143

Notificação para pagamento de retribuição

#13.1

04/14/1992

RPI 1115

Deferimento

#9.1

11/26/1991

RPI 1095

Solicitação de exame técnico

#4.1

05/01/1990

RPI 1016

15.15

02/13/1990

RPI 1006

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