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Official data from INPI

PROCESSO PARA A RECUPERAÇÃO DO ENXOFRE

PublicadaInvention Patent

Application data

Number

PI8800796

Type

Invention Patent

Filing

02/25/1988

Publication

10/04/1988

Progress at the INPI

  1. Filing02/25/88
  2. Publication10/04/88
  3. Examination08/07/90
  4. Allowance03/19/96
  5. Grant12/31/96
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 10/04/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

See this company's full portfolio

Inventors

A. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

020.040 · 02/27/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

10/04/1988

RPI 937

Pedido de patente depositado

#2.1

05/10/1988

RPI 916

Carta-patente expirada

#21.1

Patente extinta em 25/02/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

12/31/1996

RPI 1361

Deferimento

#9.1

03/19/1996

RPI 1320

14.1

11/08/1994

RPI 1249

14.4

11/01/1994

RPI 1248

Pedido de certificado de adição de invenção

#5.1

10/30/1990

RPI 1039

Solicitação de exame técnico

#4.1

08/07/1990

RPI 1027

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