Official data from INPI

SEM TITULO

ConcedidaInvention Patent

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Application data

Number

PI7405904

Type

Invention Patent

Filing

07/17/1974

Publication

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Progress at the INPI

Filing07/17/74
Publication
Examination
Allowance
Grant05/12/81
Expired11/17/92

The letters patent expired on 11/17/1992: 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: 05/12/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Societe des Mines et Fonderies de Zinc de la Vieille-Montagne

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

C01B 33/02 C01B 33/12 C01G 9/00 C01G 9/06 C22B 19/00 C22B 19/20 C22B 3/00 C22B 3/04 C22C 22/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/12/1981

RPI 551

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era C22B 19/22.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

11/17/1992

RPI 1146

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