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Official data from INPI

PROCESSO DE PURIFICAÇÃO DE LICORES CÁUSTICOS

Em AnáliseInvention Patent

Application data

Number

PI8604269

Type

Invention Patent

Filing

09/05/1986

Publication

05/05/1987

Progress at the INPI

  1. Filing09/05/86
  2. Publication05/05/87
  3. Examination08/11/87
  4. Allowance03/03/92
  5. Grant01/26/93
  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: 08/11/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Kaiser Aluminum & Chemical Corporation

US

Inventors

J. M. (pessoa física)

US

M. R. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

773.265 · 09/06/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/11/1987

RPI 877

Publicação do pedido de patente

#3.1

05/05/1987

RPI 863

Pedido de patente depositado

#2.1

03/17/1987

RPI 856

Carta-patente expirada

#21.1

Patente extinta em 05/09/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

01/26/1993

RPI 1156

Notificação para pagamento de retribuição

#13.1

07/28/1992

RPI 1130

Deferimento

#9.1

03/03/1992

RPI 1109

Exigência - art. 36 da LPI

#6.1

05/14/1991

RPI 1067

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