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Official data from INPI

PROCESSO PARA A RECUPERAÇÃO DE COMPONENTE DE GÁS DE SÍNTESE

PublicadaInvention Patent

Application data

Number

PI8806598

Type

Invention Patent

Filing

12/14/1988

Publication

08/22/1989

Progress at the INPI

  1. Filing12/14/88
  2. Publication08/22/89
  3. Examination10/16/90
  4. Allowance03/14/95
  5. Grant09/26/95
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 08/22/1989. 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

T. F. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

133.430 · 12/15/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

08/22/1989

RPI 983

Pedido de patente depositado

#2.1

04/18/1989

RPI 965

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C01B 31/18; C01B 21/00.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinta em 14/12/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

09/26/1995

RPI 1295

Deferimento

#9.1

03/14/1995

RPI 1267

14.1

11/01/1994

RPI 1248

14.4

10/25/1994

RPI 1247

Solicitação de exame técnico

#4.1

10/16/1990

RPI 1037

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