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Official data from INPI

PROCESSO PARA CONTROLE DE CONTAMINAÇÃO BIOLÓGICA EM SISTEMAS DE INJEÇÃO DE ÁGUA EM CAMPOS DE PRODUÇÃO DE PETRÓLEO

PublicadaInvention Patent
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Application data

Number

PI8901696

Type

Invention Patent

Filing

04/10/1989

Publication

11/21/1989
View on INPI

Progress at the INPI

  1. Filing04/10/89
  2. Publication11/21/89
  3. Examination02/11/92
  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.

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Latest action published by the INPI: 11/21/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Rohm And Haas Company

US

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Inventors

T. H. (pessoa física)

US

Technical data

IPC Classification

C02F 1/50

Priority claims

US

179,698 · 04/11/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/21/1989

RPI 996

Pedido de patente depositado

#2.1

05/23/1989

RPI 970

Carta-patente expirada

#21.1

Patente extinta em 10/04/2004

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

08/08/1995

RPI 1288

Exigência - art. 36 da LPI

#6.1

03/07/1995

RPI 1266

Solicitação de exame técnico

#4.1

02/11/1992

RPI 1106

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