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Official data from INPI

PROCESSO PARA TRATAR CELULOSE PARA AUMENTAR SUA REATIVIDADE QUÍMICA E BIOLÓGICA E MATERIAL CONTENDO CELULOSE TRATADO PELO DITO PROCESSO.

ConcedidaInvention Patent

Application data

Number

PI8205849

Type

Invention Patent

Filing

07/01/1982

Publication

09/06/1983

Progress at the INPI

  1. Filing07/01/82
  2. Publication09/06/83
  3. Examination06/12/84
  4. Allowance02/12/86
  5. Grant06/24/86
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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

C. F. (pessoa física)

US

See this company's full portfolio

Inventors

R. G. (pessoa física)

IT

Technical data

IPC Classification

Priority claims

IT

67939-A/81 · 07/06/1981

US

311.168 · 10/14/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/24/1986

RPI 818

Deferimento

#9.1

02/12/1986

RPI 799

Exigência - art. 36 da LPI

#6.1

07/09/1985

RPI 768

Exigência - art. 36 da LPI

#6.1

11/27/1984

RPI 736

Solicitação de exame técnico

#4.1

06/12/1984

RPI 712

Publicação do pedido de patente

#3.1

09/06/1983

RPI 672

Pedido de patente depositado

#2.1

11/30/1982

RPI 632

Carta-patente expirada

#21.1

Patente extinta em 01/07/97

07/01/2008

RPI 1956

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