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Official data from INPI

PROCESSO PARA TRATAMENTO DE LAMAS PRECIPITADAS EM PLANTAS DE ÁCIDO FOSFÓRICO

PublicadaInvention Patent
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Application data

Number

PI8801927

Type

Invention Patent

Filing

04/22/1988

Publication

11/14/1989
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Progress at the INPI

  1. Filing04/22/88
  2. Publication11/14/89
  3. Examination08/14/90
  4. Allowance07/09/96
  5. Grant08/26/97
  6. Expired08/26/08

The letters patent expired on 08/26/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 11/14/1989. 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

C01B 25/234C05B 17/00

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

08/02/1988

RPI 928

Carta-patente expirada

#21.1

Patente extinta em 22/04/2008

08/26/2008

RPI 1964

Concessão da patente

#16.1

08/26/1997

RPI 1395

Notificação para pagamento de retribuição

#13.1

03/11/1997

RPI 1371

Deferimento

#9.1

07/09/1996

RPI 1336

Exigência - art. 36 da LPI

#6.1

11/21/1995

RPI 1303

Exigência - art. 36 da LPI

#6.1

04/26/1994

RPI 1221

Solicitação de exame técnico

#4.1

08/14/1990

RPI 1028

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