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Official data from INPI

COMPOSICAO CONTENDO POLIMERO HIDROSSOLUVEL, VAZAVEL, LIQUIDA, PARA ESPESSAR MEIOS AQUOSOS, E FLUIDO DE TRATAMENTO OU PERFURACAO DE POCOS

IndeferidaInvention Patent

Application data

Number

PI8100364

Type

Invention Patent

Filing

01/25/1980

Publication

-

Progress at the INPI

Under appeal
  1. Filing01/25/80
  2. Publication
  3. Examination02/02/82
  4. Refused08/14/84
  5. Grant
  6. In force

The application was refused by the INPI on 08/14/1984. The invention was never patented.

Talk to a specialist

Latest action published by the INPI: 08/14/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NL INDUSTRIES INC

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Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Indeferimento

#9.2

08/14/1984

RPI 721

Pedido de certificado de adição de invenção

#5.1

06/22/1982

RPI 609

Solicitação de exame técnico

#4.1

02/02/1982

RPI 589

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