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Official data from INPI

PROCESSO PARA A PREVENÇÃO DE INCRUSTAÇÃO DE SUPERFÍCIES METÁLICAS EXPOSTAS A GASES DE ALFA-OLEFINAS REATIVOS DURANTE A PRODUÇÃO DE RESINAS POLIMÉRICAS; E PROCESSO PARA INIBIÇÃO DE AGLOMERAÇÃO DE POLÍMEROS EM TROCADORES DE CALOR DURANTE A POLIMERIZAÇÃO DE ALFA-OLEFINAS

Em AnáliseInvention Patent

Application data

Number

PI8906728

Type

Invention Patent

Filing

12/22/1989

Publication

09/11/1990

Progress at the INPI

  1. Filing12/22/89
  2. Publication09/11/90
  3. Examination06/08/93
  4. Allowance
  5. Grant
  6. In force

Published on 09/11/1990, 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: 12/23/1997. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Oil Company

US

Union Carbide Chemicals and Plastics Company Inc.

US

See this company's full portfolio

Inventors

J. J. (pessoa física)

J. I. (pessoa física)

S. S. (pessoa física)

Technical data

Priority claims

US

289.266 · 12/23/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Retificação

#15.3

12/23/1997

RPI 1409

Solicitação de exame técnico

#4.1

06/08/1993

RPI 1175

14.4

03/30/1993

RPI 1165

14.3

12/03/1991

RPI 1096

Publicação do pedido de patente

#3.1

09/11/1990

RPI 1032

Pedido de patente depositado

#2.1

04/10/1990

RPI 1013

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