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Official data from INPI

UNIDADE DE MEMBRANA TROCADORA DE ÍONS, CÉLULA ELETROLÍTICA E PROCESSO DE SELAR UMA CÉLULA ELETROLÍTICA

Em AnáliseInvention Patent

Application data

Number

PI8505502

Type

Invention Patent

Filing

11/04/1985

Publication

08/05/1986

Progress at the INPI

Under appeal
  1. Filing11/04/85
  2. Publication08/05/86
  3. Examination11/18/86
  4. Refused03/03/92
  5. Grant
  6. In force

The application was refused by the INPI on 03/03/1992. The invention was never patented.

Talk to a specialist

Latest action published by the INPI: 11/18/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company

US

See this company's full portfolio

Inventors

R. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

668.043 · 11/05/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/18/1986

RPI 839

Publicação do pedido de patente

#3.1

08/05/1986

RPI 824

Pedido de patente depositado

#2.1

12/24/1985

RPI 792

Indeferimento

#9.2

03/03/1992

RPI 1109

Conhecimento de parecer técnico

#7.1

04/30/1991

RPI 1065

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