(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

PROCESSO PARA A SEPARAÇÃO DE UM EFLUENTE HIDROCARBONETO MULTIFÁSICO

PublicadaInvention Patent

Application data

Number

PI8901445

Type

Invention Patent

Filing

03/29/1989

Publication

11/14/1989

Progress at the INPI

  1. Filing03/29/89
  2. Publication11/14/89
  3. Examination11/05/91
  4. Allowance01/23/96
  5. Grant11/26/96
  6. Expired12/15/09

The letters patent expired on 12/15/2009: 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: 11/14/1989. 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

S. V. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

GB

8807807.6 · 03/31/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/14/1989

RPI 995

Pedido de patente depositado

#2.1

05/09/1989

RPI 968

Carta-patente expirada

#21.1

Patente extinta em 29/03/2004

12/15/2009

RPI 2032

Concessão da patente

#16.1

11/26/1996

RPI 1356

Notificação para pagamento de retribuição

#13.1

07/09/1996

RPI 1336

Deferimento

#9.1

01/23/1996

RPI 1312

Exigência - art. 36 da LPI

#6.1

01/31/1995

RPI 1261

Solicitação de exame técnico

#4.1

11/05/1991

RPI 1092

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.