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Official data from INPI

APARELHO PARA CONTATAR SÓLIDOS EM PARTÍCULAS COM UM FLUIDO

PublicadaInvention Patent

Application data

Number

PI8701392

Type

Invention Patent

Filing

03/26/1987

Publication

01/05/1988

Progress at the INPI

  1. Filing03/26/87
  2. Publication01/05/88
  3. Examination06/12/90
  4. Allowance03/19/96
  5. Grant12/31/96
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 01/05/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

See this company's full portfolio

Inventors

P. B. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

GB

8607698 · 03/27/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

01/05/1988

RPI 898

Pedido de patente depositado

#2.1

07/07/1987

RPI 872

Carta-patente expirada

#21.1

Patente extinta em 26/03/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

12/31/1996

RPI 1361

Deferimento

#9.1

03/19/1996

RPI 1320

Exigência - art. 36 da LPI

#6.1

08/01/1995

RPI 1287

Conhecimento de parecer técnico

#7.1

09/20/1994

RPI 1242

Solicitação de exame técnico

#4.1

06/12/1990

RPI 1022

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