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Official data from INPI

"PROCESSO PARA A PREPARAÇÃO DE P-NITROSO-FENIL-HIDROXILAMINA,E PRODUTOS".

ConcedidaInvention Patent

Application data

Number

PI7800548

Type

Invention Patent

Filing

01/30/1978

Publication

-

Progress at the INPI

  1. Filing01/30/78
  2. Publication
  3. Examination07/27/82
  4. Allowance01/10/84
  5. Grant07/31/84
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 07/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AKZO N.V.

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Inventors

B. M. (pessoa física)

Z. H. (pessoa física)

Technical data

IPC Classification

Priority claims

DE

P:.27.03 919 6 · 01/31/1977

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/31/1984

RPI 719

Notificação para pagamento de retribuição

#13.1

05/02/1984

RPI 706

Deferimento

#9.1

01/10/1984

RPI 690

Exigência - art. 36 da LPI

#6.1

08/09/1983

RPI 668

6.2

01/18/1983

RPI 639

Solicitação de exame técnico

#4.1

07/27/1982

RPI 614

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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