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Official data from INPI

PROCESSO CONTINUO PARA A PRODUCAO DE 3-NITRO-4-ACETILAMINO-TOLUENO,E DISPOSITIVO PARA SUA EXECUCAO

Em AnáliseInvention Patent

Application data

Number

PI7803290

Type

Invention Patent

Filing

05/24/1977

Publication

-

Progress at the INPI

  1. Filing05/24/77
  2. Publication
  3. Examination12/14/82
  4. Allowance04/24/84
  5. Grant10/30/84
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 09/09/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HOECHST AG

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Inventors

H. H. (pessoa física)

S. L. (pessoa física)

S. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

09/09/1986

RPI 829

Concessão da patente

#16.1

10/30/1984

RPI 732

Notificação para pagamento de retribuição

#13.1

08/21/1984

RPI 722

Deferimento

#9.1

04/24/1984

RPI 705

Exigência - art. 36 da LPI

#6.1

09/06/1983

RPI 672

Solicitação de exame técnico

#4.1

12/14/1982

RPI 634

11.8

10/05/1982

RPI 624

Arquivamento - Art. 33 da LPI

#11.1

08/10/1982

RPI 616

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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