Official data from INPI

APARELHO PARA PURIFICAR AGUA NAO CLARIFICADA

ConcedidaInvention Patent

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Application data

Number

PI7903930

Type

Invention Patent

Filing

06/22/1978

Publication

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Progress at the INPI

Filing06/22/78
Publication
Examination11/10/81
Allowance03/13/84
Grant09/25/84
Expired04/04/95

The letters patent expired on 04/04/1995: 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: 09/25/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

L. R. (pessoa física)

Inventors

K. M. (pessoa física)

Technical data

IPC Classification

C02F 1/24 D21F 1/72 E03F 5/14 E03F 5/16

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/25/1984

RPI 727

Notificação para pagamento de retribuição

#13.1

07/03/1984

RPI 715

Deferimento

#9.1

03/13/1984

RPI 699

Exigência - art. 36 da LPI

#6.1

10/04/1983

RPI 676

Solicitação de exame técnico

#4.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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