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Official data from INPI

PROCESSO PARA PREPARAÇÃO DE AR DE ALIMENTAÇÃO PARA SEPARAÇÃO POR RETIFICAÇÃO CRIOGÊNICA.

Em ExigênciaInvention Patent

Application data

Number

PI8500742

Type

Invention Patent

Filing

02/15/1985

Publication

10/08/1985

Progress at the INPI

  1. Filing02/15/85
  2. Publication10/08/85
  3. Examination12/23/86
  4. Allowance05/08/90
  5. Grant11/27/90
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 11/14/1989. 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

581.536 · 02/21/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

11/14/1989

RPI 995

Solicitação de exame técnico

#4.1

12/23/1986

RPI 844

Publicação do pedido de patente

#3.1

10/08/1985

RPI 781

Pedido de patente depositado

#2.1

05/07/1985

RPI 759

Carta-patente expirada

#21.1

Patente extinta em 15/02/2000

07/15/2008

RPI 1958

Pedido de licença compulsória

#20.1

10/25/1994

RPI 1247

20.4

10/18/1994

RPI 1246

Concessão da patente

#16.1

11/27/1990

RPI 1043

Notificação para pagamento de retribuição

#13.1

08/21/1990

RPI 1029

Deferimento

#9.1

05/08/1990

RPI 1017

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