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Official data from INPI

PROCESSO PARA PREPARACAO DE UM COMPLEXO NAO CARBONADO CONTENDO MAGNESIO;COMPLEXO NAO CARBONADO CONTENDO MAGNESIO;COMPLEXO ESPESSADO;COMPLEXO DE OXIDO OU HIDROXIDO DE MAGNESIO E UM SULFANATO DE MAGNESIO;CONCENTRADO ADITIVO;COMPOSICAO CONTENDO MAGNESIO;E ARTIGO DE MANUFATURA

ConcedidaInvention Patent

Application data

Number

PI7702529

Type

Invention Patent

Filing

01/18/1977

Publication

-

Progress at the INPI

  1. Filing01/18/77
  2. Publication
  3. Examination
  4. Allowance08/30/83
  5. Grant03/27/84
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 04/17/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

LUBRIZOL CORP

See this company's full portfolio

Inventors

F. J. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Republicação - classificação IPC

#15.11

04/17/1984

RPI 704

Concessão da patente

#16.1

03/27/1984

RPI 701

Republicação - classificação IPC

#15.11

01/10/1984

RPI 690

Notificação para pagamento de retribuição

#13.1

12/20/1983

RPI 687

Deferimento

#9.1

08/30/1983

RPI 671

Exigência - art. 36 da LPI

#6.1

02/08/1983

RPI 642

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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