Official data from INPI

LIGA DE ALUMINIO UTIL COMO ANODO GALVANICO DE SACRIFICIO NA PROTECAO CATODICA DE ESTRUTURAS FERROSAS E PROCESSO PARA MELHORAR O DESEMPENHO DE ANODOS GALVANICOS

Em AnáliseInvention Patent

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Application data

Number

PI7601735

Type

Invention Patent

Filing

03/22/1976

Publication

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Progress at the INPI

Filing03/22/76
Publication
Examination
Allowance
Grant12/29/81
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: 06/28/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOWN CHEM CO

Inventors

R. J. (pessoa física)

R. R. (pessoa física)

Technical data

IPC Classification

C22C 21/10 C25D 17/10

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.7

06/28/1988

RPI 923

14.2

09/04/1984

RPI 724

20.4

05/08/1984

RPI 707

Pedido de licença compulsória

#20.1

05/02/1984

RPI 706

Concessão da patente

#16.1

12/29/1981

RPI 584

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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