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Official data from INPI

PROCESSO PARA O BENEFICIAMENTO DE MINERAIS VALIOSOS A PARTIR DE MINÉRIOS CONTENDO TEORES DOS DITOS MINERAIS VALIOSOS E SILICATOS HIDRATADOS ESTRATIFICADOS, COM REJEIÇÃO SELETIVA DOS SILICATOS HIDRATADOS

PublicadaInvention Patent

Application data

Number

PI8901587

Type

Invention Patent

Filing

04/04/1989

Publication

11/21/1989

Progress at the INPI

  1. Filing04/04/89
  2. Publication11/21/89
  3. Examination03/03/92
  4. Allowance11/05/96
  5. Grant08/26/97
  6. Expired05/21/13

The letters patent expired on 05/21/2013: 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: 11/21/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

American Cyanamid Company

US

See this company's full portfolio

Inventors

H. P. (pessoa física)

US

N. L. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

ZA

88/2394 · 04/05/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/21/1989

RPI 996

Pedido de patente depositado

#2.1

05/23/1989

RPI 970

Carta-patente expirada

#21.1

Patente extinta em 04/04/2009

05/21/2013

RPI 2211

Concessão da patente

#16.1

08/26/1997

RPI 1395

Deferimento

#9.1

11/05/1996

RPI 1353

Exigência - art. 36 da LPI

#6.1

04/02/1996

RPI 1322

Solicitação de exame técnico

#4.1

03/03/1992

RPI 1109

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