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Official data from INPI

PROCESSO PARA PRODUZIR ÓXIDO DE ETILENO

Prazo de SigiloInvention Patent
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Application data

Number

PI8903657

Type

Invention Patent

Filing

07/24/1989

Publication

03/13/1990
View on INPI

Progress at the INPI

  1. Filing07/24/89
  2. Publication03/13/90
  3. Examination04/07/92
  4. Allowance04/02/96
  5. Grant03/25/97
  6. Expired12/22/09

The letters patent expired on 12/22/2009: 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: 10/03/1989. 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

A. L. (pessoa física)

US

Technical data

IPC Classification

C07D 301/10C07D 303/04

Priority claims

US

224,046 · 07/25/1988

US

224,514 · 07/25/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

10/03/1989

RPI 989

Carta-patente expirada

#21.1

Patente extinta em 24/07/2004

12/22/2009

RPI 2033

Concessão da patente

#16.1

03/25/1997

RPI 1373

Deferimento

#9.1

04/02/1996

RPI 1322

Exigência - art. 36 da LPI

#6.1

08/15/1995

RPI 1289

Exigência - art. 36 da LPI

#6.1

01/03/1995

RPI 1257

Pedido de certificado de adição de invenção

#5.1

09/15/1992

RPI 1137

Solicitação de exame técnico

#4.1

04/07/1992

RPI 1114

Publicação do pedido de patente

#3.1

03/13/1990

RPI 1009

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