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Official data from INPI

PROCESSO PARA A PREPARACAO DE ETER DIMETILICO PELA DESIDRATACAO CATALITICA DE METANOL

IndeferidaInvention Patent

Application data

Number

PI8303437

Type

Invention Patent

Filing

07/01/1982

Publication

02/07/1984

Progress at the INPI

Under appeal
  1. Filing07/01/82
  2. Publication02/07/84
  3. Examination02/04/86
  4. Refused08/02/88
  5. Grant
  6. In force

The application was refused by the INPI on 08/02/1988. The invention was never patented.

Talk to a specialist

Latest action published by the INPI: 08/02/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT [US]

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Inventors

B. D. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Indeferimento

#9.2

08/02/1988

RPI 928

Pedido de certificado de adição de invenção

#5.1

04/01/1986

RPI 806

Solicitação de exame técnico

#4.1

02/04/1986

RPI 798

Publicação do pedido de patente

#3.1

02/07/1984

RPI 694

Pedido de patente depositado

#2.1

08/09/1983

RPI 668

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