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Official data from INPI

MISTURA CONTENDO ACIDO SILICICO

Em AnáliseInvention Patent

Application data

Number

PI7500125

Type

Invention Patent

Filing

01/10/1974

Publication

-

Progress at the INPI

  1. Filing01/10/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant04/27/82
  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: 05/03/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DEGUSSA

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Inventors

P. J. (pessoa física)

T. F. (pessoa física)

W. S. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

05/03/1983

RPI 654

Concessão da patente

#16.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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