Official data from INPI

REVESTIMENTO OVOIDE COMPOSTO DE SEGMENTOS PRE-FABRICADOS DE CONCRETO ARMADO PARA VIAS SUBTERRANEAS CONSTRUIDAS PELO SISTEMA "A CEU ABERTO"

Em AnáliseInvention Patent

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Application data

Number

PI7702615

Type

Invention Patent

Filing

04/26/1977

Publication

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Progress at the INPI

Filing04/26/77
Publication
Examination
Refused12/21/82
Grant
In force

The application was refused on 12/21/1982 and the appeal did not change the decision. The invention was never patented and the technology is in the public domain in Brazil.

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Latest action published by the INPI: 12/21/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

METRO CO METROPOLITANO SAO PAU

Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

111

12/21/1982

RPI 635

15.0

08/31/1982

RPI 619

Petição de recurso

#12.2

02/24/1982

RPI 592

Indeferimento

#9.2

11/03/1981

RPI 576

From the same holder

ANEL CIRCULAR DE SEGMENTOS DE CONCRETO ARMADO PRE-FABRICADOS PARA REVESTIMENTO DE TUNEIS

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