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Official data from INPI

PROCESSO PARA TRATAMENTO DE ÁCIDO CONTAMINADO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9103508

Type

Invention Patent

Filing

08/15/1991

Publication

05/12/1992

Progress at the INPI

  1. Filing08/15/91
  2. Publication05/12/92
  3. Examination10/05/93
  4. Allowance11/03/98
  5. Grant04/27/99
  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: 06/04/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

See this company's full portfolio

Inventors

M. D. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

567.786 · 08/15/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinte em 15/08/2011

06/04/2013

RPI 2213

Concessão da patente

#16.1

04/27/1999

RPI 1477

Deferimento

#9.1

11/03/1998

RPI 1452

Exigência - art. 36 da LPI

#6.1

04/07/1998

RPI 1424

Solicitação de exame técnico

#4.1

10/05/1993

RPI 1192

14.4

06/01/1993

RPI 1174

14.7

06/01/1993

RPI 1174

Publicação do pedido de patente

#3.1

05/12/1992

RPI 1119

Pedido de patente depositado

#2.1

09/17/1991

RPI 1085

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