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Official data from INPI

MEMBRANA DE SEPARAÇÃO DE GÁS E PROCESSO PARA SEPARAR GASES

PublicadaInvention Patent

Application data

Number

PI8806088

Type

Invention Patent

Filing

11/21/1988

Publication

08/08/1989

Progress at the INPI

  1. Filing11/21/88
  2. Publication08/08/89
  3. Examination09/24/91
  4. Allowance
  5. Grant
  6. In force

Published on 08/08/1989, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

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Latest action published by the INPI: 08/08/1989. 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

T. J. (pessoa física)

Technical data

Priority claims

US

123.495 · 11/20/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

08/08/1989

RPI 981

Pedido de patente depositado

#2.1

04/04/1989

RPI 963

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: B01D 13/04; B01D 13/00.

03/27/2018

RPI 2464

Retificação

#15.3

10/03/1995

RPI 1296

Solicitação de exame técnico

#4.1

09/24/1991

RPI 1086

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