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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UM POLÍMERO AMINADO APERFEIÇOADOR DO ÍNDICE DE VISCOSIDADE DE UM DISPERSANTE E COMPOSIÇÃO DE ÓLEO LUBRIFICANTE

Arquivada/ExtintaInvention Patent

Application data

Number

PI9005065

Type

Invention Patent

Filing

10/10/1990

Publication

09/17/1991

Progress at the INPI

  1. Filing10/10/90
  2. Publication09/17/91
  3. Examination10/13/93
  4. Allowance09/28/99
  5. Grant04/18/00
  6. Expired05/21/13

The letters patent expired on 05/21/2013: 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: 05/21/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

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Inventors

J. M. (pessoa física)

US

J. G. (pessoa física)

US

Technical data

Priority claims

US

420,974 · 10/12/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 10/10/2010

05/21/2013

RPI 2211

Concessão da patente

#16.1

04/18/2000

RPI 1528

Deferimento

#9.1

09/28/1999

RPI 1499

Exigência - art. 36 da LPI

#6.1

05/04/1999

RPI 1478

Exigência - art. 36 da LPI

#6.1

08/11/1998

RPI 1442

Solicitação de exame técnico

#4.1

10/13/1993

RPI 1193

Publicação do pedido de patente

#3.1

09/17/1991

RPI 1085

Pedido de patente depositado

#2.1

04/09/1991

RPI 1062

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