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Official data from INPI

PROCESSO PARA A FABRICACAO DE NITRO-PARAFINAS POR NITRACAO EM FASE GASOSA

ConcedidaInvention Patent

Application data

Number

PI7902008

Type

Invention Patent

Filing

04/04/1978

Publication

-

Progress at the INPI

  1. Filing04/04/78
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant09/27/83
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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: 09/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AZOTE & PROD CHIM

Inventors

J. B. (pessoa física)

L. P. (pessoa física)

Q. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1983

RPI 675

Notificação para pagamento de retribuição

#13.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

6.2

03/16/1982

RPI 595

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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