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Official data from INPI

CORANTES COMPLEXOS CROMEFEROS E SEU PROCESSO DE PREPARACA

Em AnáliseInvention Patent

Application data

Number

PI7500751

Type

Invention Patent

Filing

02/06/1974

Publication

-

Progress at the INPI

  1. Filing02/06/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant01/26/82
  6. Expired09/21/93

The letters patent expired on 09/21/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 05/08/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

U. K. (pessoa física)

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Inventors

B. A. (pessoa física)

B. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

05/08/1984

RPI 707

20.7

05/02/1984

RPI 706

20.4

04/10/1984

RPI 703

Concessão da patente

#16.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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