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Official data from INPI

PROCESSO PARA PREPARAR UMA SOLUCAO AQUOSA DILUIDA DE UMA POLIACRILAMIDA CATIONICAMENTE MODIFICADA

IndeferidaInvention Patent

Application data

Number

PI7702919

Type

Invention Patent

Filing

05/05/1977

Publication

-

Progress at the INPI

Under appeal
  1. Filing05/05/77
  2. Publication
  3. Examination
  4. Refused12/28/82
  5. Grant
  6. In force

The application was refused by the INPI on 12/28/1982. The invention was never patented.

Talk to a specialist

Latest action published by the INPI: 12/28/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NALCO CHEMICAL CO

Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Indeferimento

#9.2

12/28/1982

RPI 636

Conhecimento de parecer técnico

#7.1

05/18/1982

RPI 604

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