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Official data from INPI

PROCESSO CONTÍNUO DE RECUPERAÇÃO DE ENXOFRE E FILTRO ROTATIVO CONTÍNUO

Em AnáliseInvention Patent

Application data

Number

PI8702857

Type

Invention Patent

Filing

06/05/1987

Publication

12/20/1988

Progress at the INPI

  1. Filing06/05/87
  2. Publication12/20/88
  3. Examination10/24/89
  4. Allowance11/24/92
  5. Grant06/29/93
  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: 10/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Petróleo Brasileiro S/A - Petrobrás

RJ, BR

See this company's full portfolio

Inventors

E. M. (pessoa física)

BR

G. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/24/1989

RPI 992

Publicação do pedido de patente

#3.1

12/20/1988

RPI 948

Pedido de patente depositado

#2.1

08/04/1987

RPI 876

Carta-patente expirada

#21.1

Patente extinta em 05/06/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

06/29/1993

RPI 1178

Notificação para pagamento de retribuição

#13.1

04/13/1993

RPI 1167

Deferimento

#9.1

11/24/1992

RPI 1147

Exigência - art. 36 da LPI

#6.1

01/07/1992

RPI 1101

15.17

02/19/1991

RPI 1055

15.5

08/28/1990

RPI 1030

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