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Official data from INPI

TUBOS REFORÇADO EXTERNAMENTE POR RECALQUE, PARA POÇOS DE PETRÓLEO.

IndeferidaInvention Patent
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Application data

Number

PI8403046

Type

Invention Patent

Filing

06/22/1984

Publication

01/28/1986
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Progress at the INPI

  1. Filing06/22/84
  2. Publication01/28/86
  3. Examination05/27/86
  4. Refused08/13/91
  5. Grant
  6. In force

The application was refused on 08/13/1991 and the appeal did not change the decision. The invention was never patented and the technology is in the public domain in Brazil.

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Latest action published by the INPI: 08/22/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Petróleo Brasileiro S/A - Petrobrás

RJ, BR

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Inventors

R. A. (pessoa física)

BR

Technical data

IPC Classification

E21B 17/01

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Indeferimento

#9.2

08/22/1989

RPI 983

Conhecimento de parecer técnico

#7.1

06/28/1988

RPI 923

Solicitação de exame técnico

#4.1

05/27/1986

RPI 814

Publicação do pedido de patente

#3.1

01/28/1986

RPI 797

Pedido de patente depositado

#2.1

08/28/1984

RPI 723

111

08/13/1991

RPI 1080

Petição de recurso

#12.2

11/13/1990

RPI 1041

15.5

08/28/1990

RPI 1030

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