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Official data from INPI

PROCESSO PARA A SEPARAÇÃO DE GASES

Arquivada/ExtintaInvention Patent

Application data

Number

PI8904552

Type

Invention Patent

Filing

09/11/1989

Publication

04/24/1990

Progress at the INPI

  1. Filing09/11/89
  2. Publication04/24/90
  3. Examination08/27/91
  4. Allowance11/19/96
  5. Grant08/26/97
  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

Praxair Technology, Inc.

US

U. C. (pessoa física)

US

See this company's full portfolio

Inventors

B. B. (pessoa física)

US

S. G. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

242.602 · 09/12/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 11/09/2009

05/21/2013

RPI 2211

Concessão da patente

#16.1

08/26/1997

RPI 1395

Deferimento

#9.1

11/19/1996

RPI 1355

Exigência - art. 36 da LPI

#6.1

04/02/1996

RPI 1322

14.1

11/22/1994

RPI 1251

14.4

11/08/1994

RPI 1249

4.1.2

10/22/1991

RPI 1090

Solicitação de exame técnico

#4.1

08/27/1991

RPI 1082

Publicação do pedido de patente

#3.1

04/24/1990

RPI 1015

Pedido de patente depositado

#2.1

03/27/1990

RPI 1011

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