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Official data from INPI

PROCESSO PARA PRODUÇÃO DE ÁCIDO SULFÚRICO POR CONDENSAÇÃO DE VAPORES DE ÁCIDO SULFÚRICO

Arquivada/ExtintaInvention PatentPCT · DK1989000133

Application data

Number

PI8907477

Type

Invention Patent

Filing

05/22/1989

Publication

05/28/1991

PCT

DK1989000133

Progress at the INPI

  1. Filing05/22/89
  2. Publication05/28/91
  3. Examination11/12/91
  4. Allowance12/30/97
  5. Grant10/27/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 12/26/2012. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Haldor Topsoe A/S

DK

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Inventors

P. S. (pessoa física)

DK

Technical data

IPC Classification

Priority claims

DK

3125/88 · 06/09/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 22/05/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

10/27/1998

RPI 1451

Deferimento

#9.1

12/30/1997

RPI 1410

Exigência - art. 36 da LPI

#6.1

04/08/1997

RPI 1375

Exigência - art. 36 da LPI

#6.1

08/27/1996

RPI 1343

Solicitação de exame técnico

#4.1

11/12/1991

RPI 1093

Notificação de entrada na fase nacional - PCT

#1.3

05/28/1991

RPI 1069

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