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Official data from INPI

PROCESSO PARA PREPARACAO DE MAGNESIO DE UMA SOLUCAO DE SAL CONTENDO SULFATO DE MAGNESIO

ConcedidaInvention Patent

Application data

Number

PI7903975

Type

Invention Patent

Filing

08/04/1978

Publication

-

Progress at the INPI

  1. Filing08/04/78
  2. Publication
  3. Examination11/23/82
  4. Allowance12/06/83
  5. Grant05/29/84
  6. 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.

Talk to a specialist

Latest action published by the INPI: 05/29/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SULZER AG

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Inventors

R. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/29/1984

RPI 710

Notificação para pagamento de retribuição

#13.1

03/27/1984

RPI 701

Deferimento

#9.1

12/06/1983

RPI 685

Exigência - art. 36 da LPI

#6.1

05/10/1983

RPI 655

Solicitação de exame técnico

#4.1

11/23/1982

RPI 631

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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