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Official data from INPI

PROCESSO PARA REMOVER FERRO DE UM EXTRATO CONTENDO VALORES DE URÂNIO E PROCESSO PARA RECUPERAÇÃO DE URÂNIO A PARTIR DE ÁCIDO FOSFÓRICO POR PROCESSO A ÚMIDO

ConcedidaInvention Patent

Application data

Number

PI7701204

Type

Invention Patent

Filing

02/24/1977

Publication

-

Progress at the INPI

  1. Filing02/24/77
  2. Publication
  3. Examination
  4. Allowance01/10/89
  5. Grant09/26/89
  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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Freeport Minerals Company, firma industrial norte-americana

US

Inventors

T. W. (pessoa física)

US

W. J. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

664,996 · 03/08/1976

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

05/30/1989

RPI 971

Deferimento

#9.1

01/10/1989

RPI 951

Exigência - art. 36 da LPI

#6.1

08/09/1988

RPI 929

Retificação

#15.6

08/04/1987

RPI 876

Retificação

#15.3

04/22/1987

RPI 861

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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