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Official data from INPI

PROCESSO PARA A PREPARACAO DE SILICATOS INSOLUVEIS EM AGUA FINAMENTE DIVIDIDOS CAPAZES DE TROCA CATIONICA

ConcedidaInvention Patent

Application data

Number

PI7804876

Type

Invention Patent

Filing

07/29/1977

Publication

-

Progress at the INPI

  1. Filing07/29/77
  2. Publication
  3. Examination12/29/81
  4. Allowance04/09/85
  5. Grant08/27/85
  6. Expired12/14/93

The letters patent expired on 12/14/1993: 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: 08/27/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DEGUSSA

HENKEL KGAA

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Inventors

J. G. (pessoa física)

P. B. (pessoa física)

W. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/27/1985

RPI 775

Notificação para pagamento de retribuição

#13.1

07/30/1985

RPI 771

Deferimento

#9.1

04/09/1985

RPI 755

Exigência - art. 36 da LPI

#6.1

06/05/1984

RPI 711

Exigência - art. 36 da LPI

#6.1

07/20/1982

RPI 613

Solicitação de exame técnico

#4.1

12/29/1981

RPI 584

Carta-patente expirada

#21.1

12/14/1993

RPI 1202

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