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Official data from INPI

APERFEICOAMENTO EM PISTAO COM CARGA DE NITROGENIO

ConcedidaInvention Patent

Application data

Number

PI8304981

Type

Invention Patent

Filing

09/14/1983

Publication

11/29/1983

Progress at the INPI

  1. Filing09/14/83
  2. Publication11/29/83
  3. Examination01/24/84
  4. Allowance09/10/85
  5. Grant12/30/86
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 12/30/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

R. P. (pessoa física)

Inventors

P. [. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/30/1986

RPI 845

14.1

07/29/1986

RPI 823

Notificação para pagamento de retribuição

#13.1

01/14/1986

RPI 795

Deferimento

#9.1

09/10/1985

RPI 777

Republicação - classificação IPC

#15.11

08/27/1985

RPI 775

Solicitação de exame técnico

#4.1

01/24/1984

RPI 692

Publicação antecipada

#3.2

11/29/1983

RPI 684

Pedido de patente depositado

#2.1

11/08/1983

RPI 681

Carta-patente expirada

#21.1

Patente extinta em 14/09/98

08/19/2008

RPI 1963

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