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

DISPOSITIVO DE LIBERAÇÃO PARA LIBERAR SUBSTÂNCIAS EM MEIOS LÍQUIDOS

Em AnáliseInvention Patent

Application data

Number

PI8502640

Type

Invention Patent

Filing

05/31/1985

Publication

02/12/1986

Progress at the INPI

  1. Filing05/31/85
  2. Publication02/12/86
  3. Examination01/19/88
  4. Allowance03/02/93
  5. Grant08/31/93
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 01/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Castex Products Limited

GB

The Wellcome Foundation Limited

GB

Inventors

D. W. (pessoa física)

GB

M. S. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8414123 · 06/02/1984

GB

8422093 · 08/31/1984

GB

8505410 · 03/02/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

01/19/1988

RPI 900

Publicação do pedido de patente

#3.1

02/12/1986

RPI 799

Pedido de patente depositado

#2.1

08/13/1985

RPI 773

Carta-patente expirada

#21.1

Patente extinta em 31/05/2000

07/15/2008

RPI 1958

Pedido de licença compulsória

#20.1

02/01/1994

RPI 1209

Concessão da patente

#16.1

08/31/1993

RPI 1187

Notificação para pagamento de retribuição

#13.1

06/15/1993

RPI 1176

Deferimento

#9.1

03/02/1993

RPI 1161

Exigência - art. 36 da LPI

#6.1

02/25/1992

RPI 1108

Patent monitoring

Track this patent in real time.

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