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Official data from INPI

PROCESSO PARA RECUPERAR ENXOFRE DE UM GAS CONTENDO SULFETO DE HIDROGÊNIO

PublicadaInvention Patent
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Application data

Number

PI8701855

Type

Invention Patent

Filing

04/15/1987

Publication

01/26/1988
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Progress at the INPI

  1. Filing04/15/87
  2. Publication01/26/88
  3. Examination08/14/90
  4. Allowance08/31/93
  5. Grant04/26/94
  6. Expired07/29/08

The letters patent expired on 07/29/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 01/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Comprimo B.V.

NL

Veg-Gasinstituut N.V.

NL

Inventors

J. L. (pessoa física)

NL

J. B. (pessoa física)

NL

J. G. (pessoa física)

NL

P. B. (pessoa física)

NL

Technical data

IPC Classification

C01B 17/04

Priority claims

NL

8600960 · 04/16/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

01/26/1988

RPI 901

Pedido de patente depositado

#2.1

07/28/1987

RPI 875

Carta-patente expirada

#21.1

Patente extinta em 15/04/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/26/1994

RPI 1221

Deferimento

#9.1

08/31/1993

RPI 1187

Exigência - art. 36 da LPI

#6.1

12/01/1992

RPI 1148

Exigência - art. 36 da LPI

#6.1

12/10/1991

RPI 1097

Pedido de certificado de adição de invenção

#5.1

11/27/1990

RPI 1043

Solicitação de exame técnico

#4.1

08/14/1990

RPI 1028

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