Official data from INPI

COMPOSICAO DE POLIMERO ALQUIL-AROMATICO E ESPUMAS DE POLIMEROS

Em AnáliseInvention Patent

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Application data

Number

PI7608278

Type

Invention Patent

Filing

06/04/1976

Publication

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Progress at the INPI

Filing06/04/76
Publication
Examination
Allowance
Grant07/27/82
Terminated11/24/87

The patent was granted on 07/27/1982 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: 11/24/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ESTIRENO DO NORDESTE SA

Inventors

S. F. (pessoa física)

Technical data

IPC Classification

C08K 5/03 C08L 101/00 C08L 21/00 C08L 23/00 C08L 25/02 C08L 25/06 C08L 33/00 C08L 33/02 C08L 51/00 C08L 51/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

11/24/1987

RPI 892

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

11/17/1981

RPI 578

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RESINAS DE POLI-SULFONA

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