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Official data from INPI

PROCESSO PARA A PRODUCAO DE AMIDA DE ACIDO NICOTINICO A PARTIR DE NITRILA DE ACIDO NICOTINICO POR HIDROLISE

Em AnáliseInvention Patent

Application data

Number

PI7602310

Type

Invention Patent

Filing

04/17/1975

Publication

-

Progress at the INPI

  1. Filing04/17/75
  2. Publication
  3. Examination
  4. Allowance10/20/81
  5. Grant08/31/82
  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: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DEGUSSA

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Inventors

B. H. (pessoa física)

F. H. (pessoa física)

M. K. (pessoa física)

S. G. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

05/31/1983

RPI 658

Concessão da patente

#16.1

08/31/1982

RPI 619

Notificação para pagamento de retribuição

#13.1

01/19/1982

RPI 587

100

10/20/1981

RPI 574

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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