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Official data from INPI

COMPOSICAO FORMADORA DE ESPUMA E PROCESSO DE FLOTACAO COM ESPUMA PARA A RECUPERACAO DE VALORES DE CARVAO EM CARVAO EM BRUTO

Em AnáliseInvention Patent

Application data

Number

PI8506897

Type

Invention Patent

Filing

08/29/1984

Publication

12/09/1986

Progress at the INPI

Under appeal
  1. Filing08/29/84
  2. Publication12/09/86
  3. Examination06/30/87
  4. Refused06/11/91
  5. Grant
  6. In force

The application was refused by the INPI on 06/11/1991. The invention was never patented.

Talk to a specialist

Latest action published by the INPI: 06/30/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO [US]

See this company's full portfolio

Inventors

H. [. (pessoa física)

K. [. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

06/30/1987

RPI 871

Notificação de entrada na fase nacional - PCT

#1.3

12/09/1986

RPI 842

Republicação - classificação IPC

#15.11

09/22/1992

RPI 1138

Republicação - classificação IPC

#15.11

11/12/1991

RPI 1093

Indeferimento

#9.2

06/11/1991

RPI 1071

Conhecimento de parecer técnico

#7.1

07/31/1990

RPI 1026

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