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Official data from INPI

PROCESSO PARA DESLIGNIFICAÇÃO DE MATERIAL LIGNOCELULÓSICO

ConcedidaInvention Patent

Application data

Number

PI7702713

Type

Invention Patent

Filing

04/28/1977

Publication

12/22/1981

Progress at the INPI

  1. Filing04/28/77
  2. Publication12/22/81
  3. Examination
  4. Allowance09/08/82
  5. Grant03/29/83
  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: 03/29/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CANADIAN INDUSTRIES LIMITED

CA

Inventors

A. Y. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

CA

251,752 · 05/04/1976

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/29/1983

RPI 649

Notificação para pagamento de retribuição

#13.1

01/11/1983

RPI 638

Deferimento

#9.1

09/08/1982

RPI 620

6.2

01/26/1982

RPI 588

Publicação do pedido de patente

#3.1

12/22/1981

RPI 583

Carta-patente expirada

#21.1

Patente extinta em 28/04/92

08/19/2008

RPI 1963

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