Official data from INPI

PROCESSO DE PREPARACAO DE ESTRUTURAS DE PERLITA EXPANDIDA

Em AnáliseInvention Patent

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Application data

Number

PI7707463

Type

Invention Patent

Filing

11/09/1976

Publication

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Progress at the INPI

Filing11/09/76
Publication
Examination
Allowance09/27/83
Grant03/27/84
Terminated07/12/88

The patent was granted on 03/27/1984 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: 07/12/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. N. (pessoa física)

Inventors

V. G. (pessoa física)

Technical data

IPC Classification

C01B 33/20

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

07/12/1988

RPI 925

Concessão da patente

#16.1

03/27/1984

RPI 701

Notificação para pagamento de retribuição

#13.1

01/17/1984

RPI 691

Deferimento

#9.1

09/27/1983

RPI 675

15.0

01/19/1982

RPI 587

Exigência - art. 36 da LPI

#6.1

12/08/1981

RPI 581

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