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Official data from INPI

PROCESSO PARA REGENERAR MATERIAIS TROCADORES DE ANIONS E CATIONS

ConcedidaInvention Patent

Application data

Number

PI8301556

Type

Invention Patent

Filing

03/30/1982

Publication

12/06/1983

Progress at the INPI

  1. Filing03/30/82
  2. Publication12/06/83
  3. Examination12/03/85
  4. Allowance09/15/87
  5. Grant05/31/88
  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: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NORTHERN ENG IND [GB]

Inventors

E. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1988

RPI 919

Notificação para pagamento de retribuição

#13.1

01/26/1988

RPI 901

Deferimento

#9.1

09/15/1987

RPI 882

6.2

11/18/1986

RPI 839

Solicitação de exame técnico

#4.1

12/03/1985

RPI 789

Publicação do pedido de patente

#3.1

12/06/1983

RPI 685

Pedido de patente depositado

#2.1

05/10/1983

RPI 655

Carta-patente expirada

#21.1

Patente extinta em 25/03/98

08/19/2008

RPI 1963

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