Official data from INPI

PROCESSO PARA A PREPARACAO DE CLORETO DE MAGNESIO ANIDRO

ConcedidaInvention Patent

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Application data

Number

PI7904815

Type

Invention Patent

Filing

07/27/1978

Publication

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Progress at the INPI

Filing07/27/78
Publication
Examination04/27/82
Allowance01/31/84
Grant08/28/84
Expired04/18/95

The letters patent expired on 04/18/1995: 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: 08/28/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINERAL PROCESS LICENSING CORP

Inventors

S. C. (pessoa física)

T. J. (pessoa física)

W. A. (pessoa física)

Technical data

IPC Classification

C01F 5/32

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/28/1984

RPI 723

Notificação para pagamento de retribuição

#13.1

05/15/1984

RPI 708

Deferimento

#9.1

01/31/1984

RPI 693

Exigência - art. 36 da LPI

#6.1

02/01/1983

RPI 641

Solicitação de exame técnico

#4.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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