Official data from INPI

APARELHO PARA ENCHER COM PASTA ANODICA UMA CELULA ELETROLITICA DE ALUMINIO

Em AnáliseInvention Patent

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Application data

Number

PI7800703

Type

Invention Patent

Filing

02/07/1977

Publication

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Progress at the INPI

Filing02/07/77
Publication
Examination
Allowance03/09/82
Grant
Terminated09/18/90

The patent was granted and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 07/28/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SUMITOMO ALUMINIUM SMELTING CO

Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

07/28/1987

RPI 875

Notificação para pagamento de retribuição

#13.1

06/29/1982

RPI 610

Deferimento

#9.1

03/09/1982

RPI 594

Anuidade - prazo legal encerrado

#18.2

09/18/1990

RPI 1033

From the same holder

PROCESSO PARA REVISTIR UMA CELULA ELETROLITICA DE ALUMINIO PROCESSO PARA A REMOCAO DE IMPUREZAS DE UMA SOLUCAO DE ALUMINATO DE SODIO APERFEICOAMENTO EM PROCESSO PARA EXTRAIR ALUMINA DE MINERIOS QUE A CONTEM

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