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Official data from INPI

SISTEMA PROCESSO E APARELHO DE GRAFITIZACAO

ConcedidaInvention Patent

Application data

Number

PI8207811

Type

Invention Patent

Filing

08/03/1981

Publication

07/19/1983

Progress at the INPI

  1. Filing08/03/81
  2. Publication07/19/83
  3. Examination11/01/83
  4. Allowance12/03/85
  5. Grant06/24/86
  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: 06/24/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

GREAT LAKES CARBON CORP [US]

Inventors

K. [. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/24/1986

RPI 818

Notificação para pagamento de retribuição

#13.1

04/22/1986

RPI 809

Deferimento

#9.1

12/03/1985

RPI 789

Exigência - art. 36 da LPI

#6.1

03/19/1985

RPI 752

Solicitação de exame técnico

#4.1

11/01/1983

RPI 680

Notificação de entrada na fase nacional - PCT

#1.3

07/19/1983

RPI 665

Carta-patente expirada

#21.1

Patente extinta em 30/07/97

08/19/2008

RPI 1963

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