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Official data from INPI

PROCESSO PARA A PURIFICAÇÃO DE SULFONATOS DE PETROLEOS RESIDUAIS EM BRUTO RESULTANTES DA PRODUÇÃO POR VIA ACIDA DE OLEOS MINERAIS E PETROLATOS

PublicadaInvention Patent

Application data

Number

PI8705844

Type

Invention Patent

Filing

10/16/1987

Publication

05/23/1989

Progress at the INPI

  1. Filing10/16/87
  2. Publication05/23/89
  3. Examination04/10/90
  4. Allowance
  5. Grant
  6. In force

Published on 05/23/1989, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

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Latest action published by the INPI: 05/23/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

F. H. (pessoa física)

BA, BR

M. L. (pessoa física)

BA, BR

Inventors

F. H. (pessoa física)

BR

M. L. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

05/23/1989

RPI 970

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Retificação

#15.3

02/16/1994

RPI 1211

Solicitação de exame técnico

#4.1

04/10/1990

RPI 1013

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