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Official data from INPI

SISTEMA E PROCESSO PARA A PRODUÇÃO DE NITROGÊNIO DE ALTA PUREZA.

Arquivada/ExtintaInvention Patent

Application data

Number

PI9103131

Type

Invention Patent

Filing

07/22/1991

Publication

02/11/1992

Progress at the INPI

  1. Filing07/22/91
  2. Publication02/11/92
  3. Examination06/29/93
  4. Allowance11/10/98
  5. Grant07/13/99
  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: 03/27/2018. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

See this company's full portfolio

Inventors

H. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

556.835 · 07/23/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C01B 21/04; B01D 13/00.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinta em 22/07/2011

06/04/2013

RPI 2213

Concessão da patente

#16.1

07/13/1999

RPI 1488

Deferimento

#9.1

11/10/1998

RPI 1453

Exigência - art. 36 da LPI

#6.1

04/07/1998

RPI 1424

14.4

06/29/1993

RPI 1178

14.7

06/29/1993

RPI 1178

Solicitação de exame técnico

#4.1

06/29/1993

RPI 1178

Publicação do pedido de patente

#3.1

02/11/1992

RPI 1106

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