Official data from INPI

PROCESSO PARA PRODUZIR CONCENTRADO DE DIOXIDO DE TITANIO SOB A FORMA DE MINERAL ANATASIO

Em AnáliseInvention Patent

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Application data

Number

PI7608748

Type

Invention Patent

Filing

12/28/1976

Publication

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Progress at the INPI

Filing12/28/76
Publication
Examination
Allowance
Grant11/25/86
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.

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Latest action published by the INPI: 08/09/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINERACAO ITAQUI LTD

Inventors

B. G. (pessoa física)

F. R. (pessoa física)

Technical data

IPC Classification

C22B 34/12

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

08/09/1988

RPI 929

Concessão da patente

#16.1

11/25/1986

RPI 840

110

06/17/1986

RPI 817

120

01/18/1983

RPI 639

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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