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Official data from INPI

PROCESSO PARA QUEIMAR COMBUSTÍVEL E OXIDANTE; APARELHO QUEIMADOR PARA EMPREGO COM OXIGÊNIO PURO OU AR ENRIQUECIDO EM OXIGÊNIO COMO O OXIDANTE

Prazo de SigiloInvention Patent

Application data

Number

PI8901119

Type

Invention Patent

Filing

03/10/1989

Publication

08/28/1990

Progress at the INPI

  1. Filing03/10/89
  2. Publication08/28/90
  3. Examination10/29/91
  4. Allowance11/03/92
  5. Grant05/25/93
  6. Expired12/15/09

The letters patent expired on 12/15/2009: 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: 04/25/1989. 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

J. A. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

190.680 · 05/05/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

04/25/1989

RPI 966

Carta-patente expirada

#21.1

Patente extinta em 10/03/2004

12/15/2009

RPI 2032

Pedido de licença compulsória

#20.1

10/25/1994

RPI 1247

20.4

10/18/1994

RPI 1246

Concessão da patente

#16.1

05/25/1993

RPI 1173

Deferimento

#9.1

11/03/1992

RPI 1144

Solicitação de exame técnico

#4.1

10/29/1991

RPI 1091

Publicação do pedido de patente

#3.1

08/28/1990

RPI 1030

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