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Official data from INPI

PROCESSO PARA REGENERAR ÓLEO LUBRIFICANTE, SISTEMA DE FILTRO PARA REGENERAR ÓLEO LUBRIFICANTE, E, SISTEMA DE FILTRO SUBSTITUÍVEL

Arquivada/ExtintaInvention Patent

Application data

Number

PI9004416

Type

Invention Patent

Filing

09/05/1990

Publication

09/10/1991

Progress at the INPI

  1. Filing09/05/90
  2. Publication09/10/91
  3. Examination09/14/93
  4. Allowance07/06/99
  5. Grant12/28/99
  6. Expired01/29/13

The letters patent expired on 01/29/2013: 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: 01/29/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Research And Engineering Company

US

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Inventors

D. B. (pessoa física)

US

P. L. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

404,154 · 09/07/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 05/09/2010

01/29/2013

RPI 2195

Concessão da patente

#16.1

12/28/1999

RPI 1512

Deferimento

#9.1

07/06/1999

RPI 1487

Exigência - art. 36 da LPI

#6.1

09/16/1997

RPI 1398

Solicitação de exame técnico

#4.1

09/14/1993

RPI 1189

Publicação do pedido de patente

#3.1

09/10/1991

RPI 1084

Pedido de patente depositado

#2.1

03/12/1991

RPI 1058

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