Official data from INPI

PROCESSO E APARELHO PARA ELETROLISE DE MGCL 2.

ConcedidaInvention Patent

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Application data

Number

PI8301286

Type

Invention Patent

Filing

03/16/1982

Publication

11/22/1983

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Progress at the INPI

Filing03/16/82
Publication11/22/83
Examination02/12/86
Allowance08/02/88
Grant06/27/89
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.

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Latest action published by the INPI: 06/27/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ISHIZUKA HIROSHI [JP]

Inventors

I. [. (pessoa física)

Technical data

IPC Classification

C25C 3/04 C25C 7/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/27/1989

RPI 975

Notificação para pagamento de retribuição

#13.1

11/29/1988

RPI 945

Deferimento

#9.1

08/02/1988

RPI 928

Exigência - art. 36 da LPI

#6.1

11/03/1987

RPI 889

6.2

11/18/1986

RPI 839

Solicitação de exame técnico

#4.1

02/12/1986

RPI 799

Publicação do pedido de patente

#3.1

11/22/1983

RPI 683

Pedido de patente depositado

#2.1

05/03/1983

RPI 654

Carta-patente expirada

#21.1

Patente extinta em 15/03/98

08/19/2008

RPI 1963

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