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Official data from INPI

COMPOSIÇÃO CATALISADORA DE DESIDROGENAÇÃO E PROCESSO PARA DESIDROGENAR UM COMPOSTO ALQUILAROMÁTICO

PublicadaInvention Patent

Application data

Number

PI8803250

Type

Invention Patent

Filing

06/30/1988

Publication

01/31/1989

Progress at the INPI

  1. Filing06/30/88
  2. Publication01/31/89
  3. Examination05/14/91
  4. Allowance03/31/98
  5. Grant10/27/98
  6. Expired12/11/12

The letters patent expired on 12/11/2012: 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: 01/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company

US

See this company's full portfolio

Inventors

A. S. (pessoa física)

US

F. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

069.464 · 07/01/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

01/31/1989

RPI 954

Pedido de patente depositado

#2.1

11/29/1988

RPI 945

Carta-patente expirada

#21.1

Patente extinta em 27/10/2008

12/11/2012

RPI 2188

Concessão da patente

#16.1

10/27/1998

RPI 1451

Deferimento

#9.1

03/31/1998

RPI 1423

Exigência - art. 36 da LPI

#6.1

09/19/1995

RPI 1294

Solicitação de exame técnico

#4.1

05/14/1991

RPI 1067

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