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Official data from INPI

PROCESSO APERFEIÇOADO PARA RECUPERAÇÃO DE ÁLCOOIS A PARTIR DE CORRENTES DE ALIMENTAÇÃO DE ÁCIDO/ÁLCOOL

Em AnáliseInvention Patent

Application data

Number

PI8604432

Type

Invention Patent

Filing

09/16/1986

Publication

05/12/1987

Progress at the INPI

  1. Filing09/16/86
  2. Publication05/12/87
  3. Examination02/08/89
  4. Allowance09/19/95
  5. Grant04/30/96
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 02/08/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Research And Engineering Company

US

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Inventors

C. Y. (pessoa física)

US

W. D. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

776.387 · 09/16/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

02/08/1989

RPI 955

Publicação do pedido de patente

#3.1

05/12/1987

RPI 864

Pedido de patente depositado

#2.1

03/24/1987

RPI 857

Carta-patente expirada

#21.1

Patente extinta em 16/09/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

04/30/1996

RPI 1326

Deferimento

#9.1

09/19/1995

RPI 1294

Exigência - art. 36 da LPI

#6.1

04/28/1992

RPI 1117

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