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Official data from INPI

PROCESSO DE ENRIQUECIMENTO DE MINERIOS OXIDADOS POR FLOTACAO POR ESPUMA

ConcedidaInvention Patent

Application data

Number

PI7706941

Type

Invention Patent

Filing

10/18/1976

Publication

-

Progress at the INPI

  1. Filing10/18/76
  2. Publication
  3. Examination
  4. Allowance02/08/83
  5. Grant12/30/86
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 12/30/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CESA SA

Inventors

P. P. (pessoa física)

P. J. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/30/1986

RPI 845

110

07/22/1986

RPI 822

Recurso

#12.1

05/24/1983

RPI 657

Deferimento

#9.1

02/08/1983

RPI 642

15.0

04/27/1982

RPI 601

Exigência - art. 36 da LPI

#6.1

03/30/1982

RPI 597

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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