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Official data from INPI

FLUIDO A BASE DE OLEO E PROCESSO DE REVESTIR DE MANEIRA ISOLANTE UMA PERFURACAO DE POCO

Em AnáliseInvention Patent

Application data

Number

PI8107426

Type

Invention Patent

Filing

10/19/1981

Publication

05/24/1983

Progress at the INPI

  1. Filing10/19/81
  2. Publication05/24/83
  3. Examination01/24/84
  4. Allowance07/19/88
  5. Abandoned
  6. In force

The application was allowed on 07/19/1988 but abandoned for failure to pay the grant fee (art. 38 of the Brazilian IP Act). The letters patent were never issued.

Talk to a specialist

Latest action published by the INPI: 11/07/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NL INDUSTRIES INC [US]

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Inventors

F. M. (pessoa física)

M. S. (pessoa física)

S. A. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação para pagamento de retribuição

#13.1

11/07/1989

RPI 994

110

09/12/1989

RPI 986

Recurso

#12.1

11/01/1988

RPI 941

Deferimento

#9.1

07/19/1988

RPI 926

Exigência - art. 36 da LPI

#6.1

09/29/1987

RPI 884

Conhecimento de parecer técnico

#7.1

03/05/1985

RPI 750

Solicitação de exame técnico

#4.1

01/24/1984

RPI 692

Publicação do pedido de patente

#3.1

05/24/1983

RPI 657

Pedido de patente depositado

#2.1

12/29/1981

RPI 584

Arquivamento - Art. 38 §2° da LPI

#11.4

10/23/1990

RPI 1038

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