Official data from INPI

PROCESSO MODULAR PARA A PRODUCAO DE NEGRO DE FUMO DE FORN

Em AnáliseInvention Patent

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Application data

Number

PI7703817

Type

Invention Patent

Filing

11/22/1976

Publication

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Progress at the INPI

Filing11/22/76
Publication
Examination
Allowance02/09/82
Grant
Expired07/06/93

The letters patent expired on 07/06/1993: 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: 08/15/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CABOT CORP

Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.7

08/15/1989

RPI 982

Notificação para pagamento de retribuição

#13.1

06/08/1982

RPI 607

Deferimento

#9.1

02/09/1982

RPI 590

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

From the same holder

LIGA RESISTENTE AO DESGASTE LIGA RESISTENTE AO DESGASTE PROCESSO PARA PREPARAR UMA MISTURA BORRACHA-NEGRO DE FUMO PROCESSO PARA DESCARBURACAO DE ESCORIAS A BASE DE ESR,E PROCESSO PARA REFUSAO DE ELETRO-ESCORIA DE LIGAS PROCESSO PARA A DESCARBURIZACAO DE ESCORIAS INICIALMENTE OBTIDAS POR ELETRO-REFUSAO;E PROCESSO PARA A ELETRO-REFUSAO DE ESCORIAS DE LIGAS COMPOSICAO DE LIGA FUNDIDA;LIGA PARA FUNDICAO;E PECA FUNDIDA DE LIGA PROCESSO PARA PRODUZIR CARBON BLACK

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