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Official data from INPI

DERIVADOS DE ÁCIDO GRAXO E/OU DE ÉSTER DE ÁCIDO GRAXO TENSOATIVOS COMO COLETORES NA FLOTAÇÃO DE MINÉRIOS NÃO SULFÍDICOS

Em AnáliseInvention PatentPCT · EP1989001256

Application data

Number

PI8907743

Type

Invention Patent

Filing

10/20/1989

Publication

08/20/1991

PCT

EP1989001256

Progress at the INPI

  1. Filing10/20/89
  2. Publication08/20/91
  3. Examination01/12/93
  4. Allowance
  5. Grant
  6. In force

Published on 08/20/1991, 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: 11/21/1995. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

H. A. (pessoa física)

DE

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Inventors

D. B. (pessoa física)

DE

D. R. (pessoa física)

DE

R. K. (pessoa física)

DE

Technical data

Priority claims

DE

P 38 36 891.9 · 10/29/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Retificação

#15.3

11/21/1995

RPI 1303

Solicitação de exame técnico

#4.1

01/12/1993

RPI 1154

Notificação de entrada na fase nacional - PCT

#1.3

08/20/1991

RPI 1081

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