Official data from INPI

PROCESSO APERFEICOADO DE INIBICAO DA CORROSAO DE METAIS FERROSOS EM MEIO AQUOSO

ConcedidaInvention Patent

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Application data

Number

PI7704568

Type

Invention Patent

Filing

07/13/1976

Publication

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Progress at the INPI

Filing07/13/76
Publication
Examination
Allowance03/16/82
Grant07/06/82
Terminated08/28/90

The patent was granted on 07/06/1982 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: 07/06/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CECA SA

E. A. (pessoa física)

Inventors

C. M. (pessoa física)

G. H. (pessoa física)

H. P. (pessoa física)

P. P. (pessoa física)

Technical data

IPC Classification

C23F 11/16

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/06/1982

RPI 611

Deferimento

#9.1

03/16/1982

RPI 595

Anuidade - prazo legal encerrado

#18.2

08/28/1990

RPI 1030

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