Official data from INPI

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Em AnáliseInvention Patent

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Application data

Number

PI7406905

Type

Invention Patent

Filing

08/21/1974

Publication

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Progress at the INPI

Filing08/21/74
Publication
Examination
Allowance
Grant07/08/80
Expired11/24/92

The letters patent expired on 11/24/1992: 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: 10/19/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Centralab Inc.

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

C08J 7/04 C08L 33/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

10/19/1982

RPI 626

Concessão da patente

#16.1

07/08/1980

RPI 507

Carta-patente expirada

#21.1

11/24/1992

RPI 1147

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