Official data from INPI

SEM TITULO

ConcedidaInvention Patent

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Application data

Number

PI7406722

Type

Invention Patent

Filing

08/15/1974

Publication

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Progress at the INPI

Filing08/15/74
Publication
Examination
Allowance
Grant06/02/81
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: 06/02/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Metallgesellschaft

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

C01B 32/40 C01B 3/38

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/02/1981

RPI 554

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era C01B 31/18.

03/20/2018

RPI 2463

Carta-patente expirada

#21.1

11/17/1992

RPI 1146

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