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Official data from INPI

PROCESSO DUPLO DE ADSORÇÃO POR OSCILAÇÃO DE PRESSÃO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9104561

Type

Invention Patent

Filing

10/22/1991

Publication

05/26/1992

Progress at the INPI

  1. Filing10/22/91
  2. Publication05/26/92
  3. Examination09/08/93
  4. Allowance05/04/99
  5. Grant11/16/99
  6. Expired06/11/13

The letters patent expired on 06/11/2013: 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: 06/11/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

Union Carbide Industrial Gases Technology Corporation

US

See this company's full portfolio

Inventors

F. L. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

603.479 · 10/25/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 22/10/2011

06/11/2013

RPI 2214

Concessão da patente

#16.1

11/16/1999

RPI 1506

Republicação - classificação IPC

#15.11

Alterada para Int. Cl.6 B01D 53/04

05/04/1999

RPI 1478

Deferimento

#9.1

05/04/1999

RPI 1478

Exigência - art. 36 da LPI

#6.1

10/27/1998

RPI 1451

Solicitação de exame técnico

#4.1

09/08/1993

RPI 1188

14.4

06/01/1993

RPI 1174

14.7

06/01/1993

RPI 1174

Publicação do pedido de patente

#3.1

05/26/1992

RPI 1121

Pedido de patente depositado

#2.1

11/26/1991

RPI 1095

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