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Official data from INPI

PROCESSO PARA TRATAMENTO DE LAMAS PRECIPITADAS EM PLANTAS DE ÁCIDO FOSFÓRICO

PublicadaInvention Patent

Application data

Number

PI8706722

Type

Invention Patent

Filing

12/11/1987

Publication

07/11/1989

Progress at the INPI

  1. Filing12/11/87
  2. Publication07/11/89
  3. Examination03/13/90
  4. Allowance11/21/95
  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: 07/11/1989. 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

F. C. (pessoa física)

BR

P. A. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/11/1989

RPI 977

Pedido de patente depositado

#2.1

04/05/1988

RPI 911

Carta-patente expirada

#21.1

Patente extinta em 11/12/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

12/31/1996

RPI 1361

Notificação para pagamento de retribuição

#13.1

06/18/1996

RPI 1333

Deferimento

#9.1

11/21/1995

RPI 1303

Exigência - art. 36 da LPI

#6.1

04/26/1994

RPI 1221

Solicitação de exame técnico

#4.1

03/13/1990

RPI 1009

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