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Official data from INPI

PROCESSO PARA A PRODUCAO DE PENEIRA MOLECULAR ZEOLITICA,CRISTALINA DO TIPO A,PENEIRA PRODUZIDA PELO DITO PROCESSO E SUA UTILIZACAO

Em AnáliseInvention Patent

Application data

Number

PI7602309

Type

Invention Patent

Filing

04/18/1975

Publication

-

Progress at the INPI

  1. Filing04/18/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant04/26/83
  6. Expired08/03/93

The letters patent expired on 08/03/1993: 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: 11/29/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DEGUSSA

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Inventors

K. D. (pessoa física)

P. E. (pessoa física)

R. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

11/29/1983

RPI 684

Concessão da patente

#16.1

04/26/1983

RPI 653

14.4

12/14/1982

RPI 634

Notificação para pagamento de retribuição

#13.1

12/08/1981

RPI 581

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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