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Official data from INPI

PROCESSO PARA A SEPARAÇÃO DE NITROGÊNIO E METANO

PublicadaInvention Patent

Application data

Number

PI8701069

Type

Invention Patent

Filing

03/09/1987

Publication

09/13/1988

Progress at the INPI

  1. Filing03/09/87
  2. Publication09/13/88
  3. Examination08/14/90
  4. Allowance03/12/91
  5. Grant09/24/91
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 09/13/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

See this company's full portfolio

Inventors

J. M. (pessoa física)

US

J. H. (pessoa física)

US

R. P. (pessoa física)

US

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

09/13/1988

RPI 934

Pedido de patente depositado

#2.1

06/23/1987

RPI 870

Carta-patente expirada

#21.1

Patente extinta em 09/03/2002

07/29/2008

RPI 1960

Pedido de licença compulsória

#20.1

11/01/1994

RPI 1248

20.4

10/25/1994

RPI 1247

Concessão da patente

#16.1

09/24/1991

RPI 1086

Notificação para pagamento de retribuição

#13.1

06/25/1991

RPI 1073

Deferimento

#9.1

03/12/1991

RPI 1058

Solicitação de exame técnico

#4.1

08/14/1990

RPI 1028

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