Official data from INPI

PROCESSO E PREPARACAO DE ETENO

Em AnáliseInvention Patent

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Application data

Number

PI7705256

Type

Invention Patent

Filing

08/09/1977

Publication

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Progress at the INPI

Filing08/09/77
Publication
Examination
Allowance
Grant
Expired07/13/93

The letters patent expired on 07/13/1993: 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: 08/30/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PETROLEO BRASILEIRO SA

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Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

320

08/30/1983

RPI 671

201

02/16/1983

RPI 643

17.3

10/19/1982

RPI 626

Pedido de licença voluntária

#17.1

09/08/1982

RPI 620

Notificação para pagamento de retribuição

#13.1

12/08/1981

RPI 581

Carta-patente expirada

#21.1

07/13/1993

RPI 1180

From the same holder

PROCESSO DE OBTENCAO DE CORRENTES GASOSAS RICAS EM ETENO MECANISMO ANTI-SEGREGACIONAL PARA PARTICULAS SOLIDAS PLATAFORMA AUTO-ELEVATORIA DE PERFURACAO MARITIMA PROCESSO HIDROGENANTE PARA REFINO DE OLEO DE XISTO PROCESSO DE OBTENCAO DE ELASTOMEROS LIQUIDOS TRATAMENTO HIDROGENANTE DE MISTURA DE HIDROCARBONETOS SISTEMA ROTATIVO DE TRANSMISSAO DE SINAIS MULTIPLOS

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