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Official data from INPI

SISTEMA E PROCESSO PARA A PRODUÇÃO DE NITROGÊNIO E/OU OXIGÊNIO SECO E DE ALTA PUREZA A PARTIR DO AR

Arquivada/ExtintaInvention Patent

Application data

Number

PI9102492

Type

Invention Patent

Filing

06/17/1991

Publication

01/21/1992

Progress at the INPI

  1. Filing06/17/91
  2. Publication01/21/92
  3. Examination09/28/93
  4. Allowance05/11/99
  5. Grant11/16/99
  6. Expired06/04/13

The letters patent expired on 06/04/2013: 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: 06/04/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

Union Carbide Industrial Gases Technology Corporation

US

See this company's full portfolio

Inventors

F. N. (pessoa física)

US

O. H. (pessoa física)

US

R. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

539.808 · 06/18/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 17/06/2011

06/04/2013

RPI 2213

Concessão da patente

#16.1

11/16/1999

RPI 1506

Deferimento

#9.1

05/11/1999

RPI 1479

Exigência - art. 36 da LPI

#6.1

02/04/1997

RPI 1366

Solicitação de exame técnico

#4.1

09/28/1993

RPI 1191

14.4

06/29/1993

RPI 1178

14.7

06/29/1993

RPI 1178

Publicação do pedido de patente

#3.1

01/21/1992

RPI 1103

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