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Official data from INPI

MÉTODO PARA A FLOTAÇÃO DE ESPUMA DE ALCATRÃO

Em AnáliseInvention PatentPCT · US1988001399

Application data

Number

PI8807493

Type

Invention Patent

Filing

05/04/1988

Publication

03/27/1990

PCT

US1988001399

Progress at the INPI

Technical opinion to answer
  1. Filing05/04/88
  2. Publication03/27/90
  3. Examination03/12/91
  4. Allowance
  5. Grant
  6. In force

The INPI issued a technical opinion on patentability. The applicant must respond for examination to continue.

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Latest action published by the INPI: 01/28/1997. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company

US

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Inventors

R. K. (pessoa física)

US

R. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

046.351 · 05/06/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Retificação

#15.3

01/28/1997

RPI 1365

Conhecimento de parecer técnico

#7.1

01/09/1996

RPI 1310

Solicitação de exame técnico

#4.1

03/12/1991

RPI 1058

Notificação de entrada na fase nacional - PCT

#1.3

03/27/1990

RPI 1011

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