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Official data from INPI

PROCESSO PARA REMOVER NITROGÊNIO DE GASES NATURAIS; PROCESSO DE RETIFICAÇÃO CRIOGÊNICA PARA A SEPARAÇÃO DE NITROGÊNIO DE GÁS NATURAL

Em AnáliseInvention Patent

Application data

Number

PI8406960

Type

Invention Patent

Filing

07/13/1984

Publication

06/11/1985

Progress at the INPI

  1. Filing07/13/84
  2. Publication06/11/85
  3. Examination05/13/86
  4. Allowance06/25/91
  5. Grant12/31/91
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 05/13/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

See this company's full portfolio

Inventors

R. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

514.338 · 07/15/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

05/13/1986

RPI 812

Notificação de entrada na fase nacional - PCT

#1.3

06/11/1985

RPI 764

Carta-patente expirada

#21.1

Patente extinta em 13/07/99

07/08/2008

RPI 1957

Pedido de licença compulsória

#20.1

10/25/1994

RPI 1247

20.4

10/18/1994

RPI 1246

16.3

03/03/1992

RPI 1109

Concessão da patente

#16.1

12/31/1991

RPI 1100

Notificação para pagamento de retribuição

#13.1

10/22/1991

RPI 1090

Deferimento

#9.1

06/25/1991

RPI 1073

Exigência - art. 36 da LPI

#6.1

01/08/1991

RPI 1049

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