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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE ÁCIDOS SULFÔNICOS E/OU SULFONATOS BETA-SUBSTITUÍDOS.

Arquivada/ExtintaInvention Patent

Application data

Number

PI9100083

Type

Invention Patent

Filing

01/10/1991

Publication

10/22/1991

Progress at the INPI

  1. Filing01/10/91
  2. Publication10/22/91
  3. Examination12/14/93
  4. Allowance05/25/99
  5. Grant11/16/99
  6. Expired05/28/13

The letters patent expired on 05/28/2013: 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: 05/28/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

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Inventors

H. D. (pessoa física)

NL

J. S. (pessoa física)

NL

R. G. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

GB

9000719.6 · 01/12/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 10/01/2011

05/28/2013

RPI 2212

Concessão da patente

#16.1

11/16/1999

RPI 1506

Deferimento

#9.1

05/25/1999

RPI 1481

Exigência - art. 36 da LPI

#6.1

09/15/1998

RPI 1447

Solicitação de exame técnico

#4.1

12/14/1993

RPI 1202

Publicação do pedido de patente

#3.1

10/22/1991

RPI 1090

Pedido de patente depositado

#2.1

07/30/1991

RPI 1078

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