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Official data from INPI

MODIFICACAO ESTAVEL AS CONDICOES DE TINGIMENTO DE CORANTES PROCESSO PARA A PREPARACAO DESTA MODIFICACAO ESTAVEL E SUA UTILIZACAO

Em AnáliseInvention Patent

Application data

Number

PI7602890

Type

Invention Patent

Filing

05/09/1975

Publication

-

Progress at the INPI

  1. Filing05/09/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant07/27/82
  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: 09/23/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HOECHST AG

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Inventors

K. H. (pessoa física)

S. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

09/23/1986

RPI 831

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

10/27/1981

RPI 575

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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