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Official data from INPI

PROCESSO DE REMOÇÃO DE IMPUREZAS ORGÂNICAS DO TIPO HUMATO DE LICORES E SUSPENSÕES PROVENIENTES DO PROCESSO BAYER

Em AnáliseInvention Patent

Application data

Number

PI8506493

Type

Invention Patent

Filing

12/26/1985

Publication

09/02/1986

Progress at the INPI

  1. Filing12/26/85
  2. Publication09/02/86
  3. Examination08/11/87
  4. Allowance04/02/91
  5. Grant10/29/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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

Nalco Chemical Company

US

Inventors

J. M. (pessoa física)

US

W. R. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

686.803 · 12/27/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/11/1987

RPI 877

14.7

05/12/1987

RPI 864

Publicação do pedido de patente

#3.1

09/02/1986

RPI 828

Pedido de patente depositado

#2.1

04/01/1986

RPI 806

Carta-patente expirada

#21.1

Patente extinta em 26/12/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

10/29/1991

RPI 1091

Notificação para pagamento de retribuição

#13.1

07/16/1991

RPI 1076

Deferimento

#9.1

04/02/1991

RPI 1061

Exigência - art. 36 da LPI

#6.1

10/30/1990

RPI 1039

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