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Official data from INPI

REVESTIMENTO DE POÇOS E MÉTODO DE FABRICAÇÃO DOS MESMOS

Em AnáliseInvention Patent
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Application data

Number

PI8500178

Type

Invention Patent

Filing

01/11/1985

Publication

08/26/1986
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Progress at the INPI

Under appeal
  1. Filing01/11/85
  2. Publication08/26/86
  3. Examination06/16/87
  4. Refused10/22/91
  5. Grant
  6. In force

The application was refused by the INPI on 10/22/1991. The invention was never patented.

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Latest action published by the INPI: 06/16/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AMANCO DO BRASIL LTDA

GO, BR

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Inventors

B. B. (pessoa física)

BR

Technical data

IPC Classification

E21B 17/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

06/16/1987

RPI 869

Publicação do pedido de patente

#3.1

08/26/1986

RPI 827

Pedido de patente depositado

#2.1

04/16/1985

RPI 756

Indeferimento

#9.2

10/22/1991

RPI 1090

Conhecimento de parecer técnico

#7.1

02/19/1991

RPI 1055

14.1

10/30/1990

RPI 1039

14.1

10/23/1990

RPI 1038

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