Official data from INPI

MAQUINA E PROCESSO APERFEICOADO PARA SEPARAR CONTINUAMENTE SOLIDOS SUSPENSOS DE UMA CORRENTE LIQUIDA ALIMENTADA

ConcedidaInvention Patent

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Application data

Number

PI7707092

Type

Invention Patent

Filing

02/14/1977

Publication

View on INPI

Progress at the INPI

Filing02/14/77
Publication
Examination
Allowance09/08/82
Grant04/26/83
Expired07/06/93

The letters patent expired on 07/06/1993: 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: 04/26/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ENVIROTECH CORP

Inventors

E. R. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/26/1983

RPI 653

Notificação para pagamento de retribuição

#13.1

01/11/1983

RPI 638

Deferimento

#9.1

09/08/1982

RPI 620

Exigência - art. 36 da LPI

#6.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

From the same holder

FILTRO DE VACUO DE DISCO ROTATIVO MAQUINA E PROCESSO DE FLUTUACAO POR MEIO DE DISPERSAO DE AR PROCESSO DE CONVERSAO DE MATERIAS DE CARBOIDRATOS EM MONOXIDO DE CARBONO E,OU CARVAO SINTETICO,RESPECTIVAMENTE,DE PRODUCAO DE QUANTIDADES SUBSTANCIAIS DE MONOXIDO DE CARBONO SISTEMA APERFEICOADO DE RESFRIAMENTO BRUSCO DE COQUE

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