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Official data from INPI

COMPOSIÇÃO; MISTURA HOMOGÊNEA DOS ÓXIDOS DE X, BA E CU; MISTURA ÍNTIMA NÃO CALCINADA; MISTURA CALCINADA; E PROCESSO PARA PREPARAR UMA PRÉ-MISTURA

Prazo de SigiloInvention Patent

Application data

Number

PI8900828

Type

Invention Patent

Filing

02/23/1989

Publication

08/28/1990

Progress at the INPI

  1. Filing02/23/89
  2. Publication08/28/90
  3. Examination06/23/92
  4. Allowance
  5. Grant
  6. In force

Published on 08/28/1990, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

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Latest action published by the INPI: 04/11/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

W R Grace & Co -Conn

US

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Inventors

J. B. (pessoa física)

L. D. (pessoa física)

Technical data

IPC Classification

Priority claims

US

188/926 · 05/02/1988

US

215.962 · 07/07/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

04/11/1989

RPI 964

Retificação

#15.3

08/23/1994

RPI 1238

Solicitação de exame técnico

#4.1

06/23/1992

RPI 1125

Publicação do pedido de patente

#3.1

08/28/1990

RPI 1030

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